- Home
- Fittings Hoses and Valves
- Fittings and Plugs
- AN-NPT Fittings and Components
- Reducer NPT 1/2in to 3/8in
- All Air and Fuel
- Air Cleaners, Filters, Intakes and Components
-
Carburetors and Components
- All Carburetors and Components
- Carburetor Accessories and Components
- Carburetor Adapters and Spacers
- Carburetor Air Bleeds
- Carburetor Base Plates
- Carburetor Bowls
- Carburetor Check Valves
- Carburetor Discharge Nozzles
- Carburetor Dust Covers
- Carburetor Floats
- Carburetor Fuel Lines
- Carburetor Jets and Components
- Carburetor Linkages
- Carburetor Main Bodies
- Carburetor Metering Blocks and Components
- Carburetor Needle and Seats
- Carburetor Power Valves and Components
- Carburetor Pump Arms
- Carburetor Pump Cams
- Carburetor Pumps
- Carburetor Rebuild Kits
- Carburetor Sight Plugs
- Carburetor Transfer Tubes and Vents
- Carburetors
- Throttle Control Kits
- Fuel Cells, Tanks and Components
- Fuel Injection Systems and Components - Electronic
-
Fuel Pumps, Regulators and Components
- All Fuel Pumps, Regulators and Components
- Fuel Filters and Components
- Fuel Pressure Regulator Components
- Fuel Pressure Regulators
- Fuel Pump
- Fuel Pump Belt Drive Pulleys
- Fuel Pump Block-Off Plates
- Fuel Pump Components and Rebuild Kits
- Fuel Pump Eccentrics
- Fuel Pump Pushrods
- Fuel Pump Spacers
- Fuel Pumps
- Intake Manifolds and Components
- Nitrous Oxide Systems and Components
- Throttle Cables, Linkages, Brackets and Components
- All Brakes
- Brake Cooling Kits and Components
-
Brake Systems And Components
- All Brake Systems And Components
- Brake Bias Adjusters and Components
- Brake Bleeders
- Brake Caliper Bushings and Spacers
- Brake Caliper Crossover Tubes
- Brake Caliper Pistons
- Brake Caliper Rebuild Kits
- Brake Clevis
- Brake Heat Shields
- Brake Hub Rotor Rings
- Brake Line Deflectors
- Brake Rods
- Brake Rotor Hats
- Brake Systems
- Brake Temperature Indicator
- Disc Brake Adapters
- Disc Brake Caliper Brackets
- Disc Brake Caliper Components
- Disc Brake Calipers
- Disc Brake Pads
- Disc Brake Rotors
- Line Locks
- Master Cylinders-Boosters and Components
- Wheel Hubs, Bearings and Components
- All Drivetrain
-
Automatic Transmissions and Components
- All Automatic Transmissions and Components
- Automatic Transmission Adapters
- Automatic Transmission Bands
- Automatic Transmission Bushings
- Automatic Transmission Clutches
- Automatic Transmission Dipsticks
- Automatic Transmission Filters
- Automatic Transmission Pans
- Automatic Transmission Pump Drives
- Automatic Transmission Rebuild Kits
- Automatic Transmission Servos and Components
- Automatic Transmission Shafts
- Automatic Transmission Springs
- Automatic Transmission Valve Bodies
- Automatic Transmissions
- Flexplates and Components
- Torque Converters and Components
- Transmission Breather
- Bellhousings and Components
- Belt and Chain Drive
-
Clutches and Components
- All Clutches and Components
- Clutch Covers and Components
- Clutch Disc Spacer Kits
- Clutch Discs
- Clutch Fork Pivot Balls
- Clutch Forks and Components
- Clutch Kits
- Clutch Pressure Plate Shims
- Clutch Pressure Plates and Components
- Clutch Slave Cylinder Rebuild Kits
- Clutch Slave Cylinders and Components
- Clutch Throwout Bearings and Components
- Couplers And Components
- Throwout Bearing Bleeders
-
Differentials and Rear-End Components
- All Differentials and Rear-End Components
- Axle Bearing Retainers
- Axle Bearings
- Axle Housing Ends
- Axle Housing Tubes
- Axle Plugs
- Axle Shafts
- Axle Spacers
- Axle Tube Rings
- C-Clips
- Differential Carrier Components
- Differential Cases
- Differential Cross Pins
- Differential Shims
- Differential Springs
- Differentials and Differential Carriers
- Drive Flange Hubs
- Front
- Pinion Crush Sleeves
- Pinion Supports
- Rear End Breathers
- Rear End Fill Tanks
- Rear End Housing Truss Supports
- Ring and Pinion Gears
- Ring and Pinion Install Kits
- Ring Gear Spacers
- Spools and Mini Spools
- Differentials and Rear-End ComponentsDrivetrain
- Drive Shafts and Components
-
Manual Transmissions and Components
- All Manual Transmissions and Components
- Flywheel Ring Gears
- Flywheel Shims
- Flywheel Weights
- Flywheels
- Manual Transmission Bands
- Manual Transmission Bearing Retainers
- Manual Transmission Bearings
- Manual Transmission Bushings
- Manual Transmission Cases and Components
- Manual Transmission Drive Flange Hubs
- Manual Transmission Gears
- Manual Transmission Pistons
- Manual Transmission Rebuild Kits and Components
- Manual Transmission Shafts
- Manual Transmission Shift Forks
- Manual Transmission Springs
- Manual Transmission Tailhousings
- Manual Transmission Thrust Washers
- Manual Transmissions
- Pilot Bearings - Roller
- Pilot Bushings
- Quick Change Differentials and Components
- Shifters and Components
- All Engines and Components
-
Belts and Pulleys
- All Belts and Pulleys
- Accessory Drives and Crankshaft Mandrels
- Alternator Pulleys
- Belt Tensioners
- Cog Style Belts
- Crank Mandrel Spacers
- Crankshaft Pulleys
- Oil Pump Drive Pulleys
- Power Steering Pulleys
- Pulley Belt Guides
- Pulley Kits
- Pulley Shields
- Pulley Shims and Spacers
- Serpentine Belts
- V-Belts
- Water Pump Pulleys
-
Camshafts and Valvetrain
- All Camshafts and Valvetrain
- Cam Gears
- Camshaft Degree Bushings
- Camshaft Locking Plates
- Camshaft Thrust Buttons
- Camshaft Thrust Plates
- Camshafts
- Guide Plates
- Lash Caps
- Lifter Guides
- Lifters
- Pushrods and Components
- Rocker Arm Shafts
- Rocker Arm Stud Girdles
- Rocker Arms and Components
- Rocker Bearings
- Rocker Spacers
- Timing Belt Sets and Components
- Timing Chain and Gear Sets and Components
- Timing Gear Drive Sets and Components
- Valve Locks
- Valve Spring Locators
- Valve Spring Retainers
- Valve Spring Shims
- Valve Springs
- Valves
- Connecting Rods and Components
- Crankshafts and Components
- Cylinder Heads and Components
- Engine Bearings
- Engine Covers, Pans and Dress-Up Components
- Engine Pre Heaters and Components
- Engines, Blocks and Components
- Harmonic Balancers
-
Oiling Systems
- All Oiling Systems
- Air Oil Separator Tanks
- Breather Tanks
- Crankcase Evacuation Systems and Components
- Crankshaft Scrapers
- Engine Oil Dipsticks
- Engine Oil Thermostats
- Lifter Valley Baffles-Vents
- Oil Accumulators, Reservoirs, and Tanks
- Oil Bypass Valves
- Oil Control Valves
- Oil Filter Adapters and Components
- Oil Filter Block-Off Plates
- Oil Filter Relocation Kits and Components
- Oil Filters
- Oil Pan Baffles
- Oil Pump
- Oil Pump Bearing
- Oil Pump Components
- Oil Pump Drive Shafts
- Oil Pump Pickups
- Oil Pump Springs
- Oil Pumps
- Oil Restrictors
- Oil Return Screens
- Oil Tank
- Vacuum Pump Regulators and Relief Valves
- Windage Trays and Components
- Pistons and Piston Rings
- All Exhaust
-
Exhaust Pipes, Systems and Components
- All Exhaust Pipes, Systems and Components
- Collector Flanges
- Exhaust Clamps
- Exhaust H and X-Pipes
- Exhaust Hangers and Components
- Exhaust Pipe - Bends
- Exhaust Pipe - Straight
- Exhaust Pipe Adapters and Reducers
- Exhaust Sensor Bungs Plugs and Adapters
- Exhaust Systems
- Exhaust Tailpipes
- Exhaust Tips
- Exhaust Y-Pipes
- Headers, Manifolds and Components
- Heat Protection
- Mufflers and Resonators
- All Exterior Components
-
Body Panels and Components
- All Body Panels and Components
- Access Panels
- Bumper Covers
- Complete Bodies
- Hoods
- Rear Valances
- Roll Bar Covers
- Skid Plates
- Body Braces
- Bumper Brackets
- Bumpers
- Cowl Panels
- Deck Lids
- Doors
- Fender Braces
- Fender Flares and Components
- Fenders
- Hood Cowls and Scoops
- Hood Hinges
- Hood Props
- Mud Flaps and Components
- Nose Panels
- Nose Valances
- Pilar Posts
- Quarter Panels
- Rock Guards
- Rocker Panels and Components
- Roof Panels
- Sail Panels
- Sheet Aluminum
- Sheet Plastic
- Sheet Polycarbonate
- Sheet Steel
- Spoiler Hinges
- Spring Steel Shrink Sleeve
- Stainless Steel Screen
- Tail Panels
- Truck Bed Covers
- Universal Hinges
- Wear Strips
- Wing and Spoilers and Components
- Wings and Spoiler Brackets
- Car and Truck Covers
- Decals and Moldings
- Lights and Components
- Mirrors, Side View and Towing
- Mirrors, Side View and Towings
- Windows and Components
- All Fasteners
- Body Fastener Kits
- Brake Fastener Kits
- Bulk Fasteners
-
Drivetrain Fastener Kits
- All Drivetrain Fastener Kits
- Axle Nuts
- Bellhousing Fastener Kits
- Differential Cover Fastener Kits
- Differential Fastener Kits
- Drive Flange Fastener Kits
- Flexplate and Flywheel Fastener Kits
- Pinion Nuts
- Pinion Support Fastener Kits
- Pressure Plate Fastener Kits
- Quick Change Fastener Kits
- Rear End Drain Plug
- Rear End Housing Fastener Kits
- Ring Gear Fastener Kits
- Safety Blanket and Shield Fastener Kits
- Spindle Nut Lock Screw
- Torque Converter Fastener Kits
- Transmission Pan Drain Plug Kits
- U-Joint Strap and Bolt Kits
- Wheel Hub Fastener Kits
-
Engine Fastener Kits
- All Engine Fastener Kits
- Accessory Drive and Crank Mandrel Fasteners
- Air Cleaner Fastener Kits
- Camshaft Fastener Kits
- Carburetor Fastener Kits
- Connecting Rod Bolts
- Cylinder Head Fastener Kits
- Cylinder Head Washers
- Distributor Fastener Kits
- Engine Fastener Kits
- Exhaust Manifold
- Exhaust Wrap Ties
- Fuel Pump Fastener Kits
- Harmonic Balancer Fastener Kits
- Intake Manifold Fastener Kits
- Main Cap Fastener Kits
- Mechanical Fan Fastener Kit
- Oil Filter Adapter Fastener Kits
- Oil Pan Fastener Kits
- Oil Pan Plug Kits
- Oil Pump Fastener Kits
- Power Steering Pump Fastener Kits
- Pulley Fastener Kits
- Rocker Arm Fastener Kits
- Spark Plug Index Washers
- Starter Fastener Kits
- Thermostat Housing Fastener Kits
- Timing Cover Fastener Kits
- Valve Cover Fastener Kits
- Water Pump Fastener Kits
- Windage Tray Fastener Kits
- Rod Ends Clevises and Components
- Steering Fastener Kits
- Suspension Fastener Kits
- Wheel and Tire Fastener Kits
- All Gaskets and Seals
- Brake System Gaskets
- Drivetrain Gaskets and Seals
-
Engine Gaskets and Seals
- All Engine Gaskets and Seals
- Air Cleaner Gaskets
- Cam Seals
- Carburetor Gaskets
- Distributor Base Gaskets
- Engine Gasket Kits
- Exhaust Header
- Fuel Cell
- Fuel Pump Gaskets
- Head Gaskets
- Intake Manifold Gaskets
- Oil Pan Drain Plug Gaskets
- Oil Pan Gaskets
- Oil Pump Seals
- Rear Cover Gaskets
- Rear Main Seals
- Timing Cover Gaskets
- Timing Cover Seals
- Valley Cover Gasket
- Valve Cover Gaskets
- Valve Stem Seals
- Water Neck Gaskets
- Water Pump Gaskets
- O-rings, Grommets and Vacuum Caps
- Power Steering Gaskets and Seals
- All Ignitions and Electrical
- Charging Systems
- Computers, Chips, Modules and Programmers
- Data Acquisition
-
Distributors, Magnetos and Crank Triggers
- All Distributors, Magnetos and Crank Triggers
- Crank Trigger Components
- Crank Trigger Kits
- Crank Trigger Pickups
- Crank Trigger Wheels
- Distributor Advance Kits
- Distributor Advance Lockouts
- Distributor Advance Springs
- Distributor Bearings
- Distributor Bushings and Collars
- Distributor Cap Adapters
- Distributor Caps
- Distributor Gears
- Distributor Ignition Modules
- Distributor Pickups
- Distributor Replacement Parts
- Distributor Rotors
- Distributor Shafts
- Distributor Shims
- Distributors
- Electric Fan Wiring and Components
- Ignition Boxes and Components
- Ignition Components
- Starters
-
Wiring Components
- All Wiring Components
- Circuit Breakers
- Electrical Fuses
- Electrical Junction Blocks
- Electrical Switch Panels and Components
- Electrical Switches and Components
- Electrical Wire
- Fuse Boxes
- Ground Straps
- Ignition Switches
- Protective Wire Sleeve
- Relays
- Shrink Sleeve Tubing
- Toggle Switch Extensions
- Wire Looms
- Wiring Connectors and Terminals
- Wiring Pigtails
- Wiring Harnesses
- All Suspension and Components
- Air Suspension and Components
-
Bushings and Mounts
- All Bushings and Mounts
- 4-Link Mounts and Brackets
- Bump Stop Shims
- Bump Stops
- Coil Spring Bushings
- Coil Spring Mounts and Brackets
- Front Control Arm Bushings
- Front Control Arm Mounts and Brackets
- Leaf Spring Bushings
- Leaf Spring Mounts and Brackets
- Panhard, Track Bar, and Rear End Locator Bushings
- Panhard, Track Bar, and Rear End Locator Mounts
- Rear Control and Trailing Arm Bushings
- Rear Control and Trailing Arm Mounts
- Rear End Housing Mount Bushings
- Serrated Blocks and Plates
- Shaft Collars
- Shock Reservoir Mounts and Brackets
- Shock-Strut Bushings
- Shock-Strut Mounts
- Strut Rod Bushings
- Suspension Bushing Kits
- Sway Bar Bushings and Mounts
- Torque Arm Bushings and Mounts
- Torque Link Bushings and Mounts
- Front Suspension Components
- Rear Suspension Components
- Shocks, Struts, Coil-Overs and Components
- Springs and Components
- Suspension Limiters and Components
- Suspension Tubes and Components
- Sway Bars and Components
- All Tools
- Air Tanks and Tools
- Brake Bleeders and Accessories
- Electrical and Electrical Testing Tools
-
Engine-Related
- All Engine-Related
- Cam Lobe Lift Indicators
- Camshaft Bearing Installation and Removal Tools
- Camshaft Degree Kits And Components
- Camshaft Installation Tools
- Carburetor Adjusting Tools
- Carburetor Drain Cups
- Carburetor Jet Holders
- Carburetor Work Stands
- Chamber Mold Kits
- Compression Testers
- Connecting Rod and Piston Vises
- Connecting Rod Install Guides
- Crankshaft Turning Tools
- Cylinder Head CC Kits and Components
- Cylinder O-Ring Groove Wire
- Dial Indicator Stands and Components
- Dial Indicators and Micrometers
- Engine Block Off Plates
- Engine Brushes
- Engine Covers
- Engine Organization Trays
- Expansion-Freeze Plug Installation Tools
- Fuel Tester
- Harmonic Balancer Puller and Installation Tools
- Leakdown Testers
- Main Cap Removal Tools
- Oil Filter Cutter
- Oil Pump Installation Tools
- Oil Pump Primers
- Pilot Bearing Tools
- Piston Install Tool
- Piston Ring Compressors
- Piston Ring Filers
- Piston Ring Squaring Tools
- Piston Stops
- Plastigauge
- Porting and Polishing Kits and Components
- Primer Bottles
- Pushrod Length Checkers
- Rocker Stud Removal Tools
- Rod Bolt Stretch Gauges
- Seal Alignment Tool
- Spark Plug Gapping Tools
- Spark Plug Indexing Tools
- Spark Plug Inspection Tools
- Timing Light Pickups and Components
- Timing Lights
- Valve Lash Adjusting Wrenches
- Valve Lock Tools
- Valve Spring Compressors
- Valve Spring Height Gauges
- Valve Spring Tester Components
- Valve Spring Testers
- Valvetrain Oil Deflectors
-
Hand and Other Tools
- All Hand and Other Tools
- Allen Wrenches
- AN Hose Pressure Testers
- AN Plumbing Tools
- Axle Spline Tool
- Ball Joint Tools
- Body Radius Tool
- Calipers
- Clutch Alignment Tools
- Coil Spring Compressor
- Deburring Tools
- Drill Bits
- Drill Fixtures and Components
- DZUS Wrenches
- Feeler Gauge Handles
- Feeler Gauges
- Flaring Tools
- Flashlights
- Flywheel Turning Tools
- Funnel Filters
- Funnels
- Grease Guns
- Grinding
- Hand Air Pump
- Heli-Coil Kits and Components
- Hose and Wire Cutters
- Level Trays, Clips, and Accessories
- Levels and Angle Finders
- Lug Nut Wrenches
- Magnets
- Mirrors
- Pliers
- Pullers
- Punch Tools
- Pyrometer Accessories and Components
- Pyrometers
- Quick Turn Spring Adjuster
- Radiator Fin Combs
- Reamers
- Rear End Housing Tools
- Remote Starter Switch
- Rivet Guns
- Schrader-Tire Valve Stem Tools
- Scrapers
- Seal Driver
- Snips and Shears
- Sockets
- Solder
- Tape Measures Rulers and Measuring Devices
- Taps
- Thread Files
- Tubing Cutters
- Weather Pack Pin Tools
- Wire Crimpers and Stripping Tools
- Wire Crimping Tool Dies
- Wire Tie Tools
- Wrenches
-
Shop Equipment
- All Shop Equipment
- Air Filter Cleaning Stations
- Battery Charger Components
- Battery Chargers
- Bead Rollers
- Canopies
- Car Body Templates
- Car Lift Components
- Car Lift Hydraulic Cylinders
- Car Lift Pumps
- Car Lifts
- Clip Boards
- Differential Setup Tools
- Digital Scales
- Drain Pans
- Engine Lift Handles
- Engine Lift Plates
- Engine Stand Casters
- Engine Stands
- Engine Tilters
- Fans and Air Blowers
- Fender Covers and Track Mats
- Floor Jack Components
- Floor Jack Springs
- Floor Jacks
- Fluid Transfer Pumps
- Fuel
- Hole Saws
- Jack and Stand Pads
- Jack Dirt Wings and Pads
- Jack Stands
- Moving Blankets
- Nitrogen Feed Hose
- Nitrogen Tank Brackets
- Nitrogen Tanks
- Note Pads and Set Up Sheets
- Oil Dry
- Pinion Depth Gauges
- Plasma Cutters
- Pneumatic Power Hammer
- Pressurized Sprayer
- Rear End Stands
- Safety Glasses
- Sheet Metal Brake
- Sheetmetal Roller
- Shop Gloves
- Shop Rags
- Shrinker
- Space Heaters
- Stopwatches
- Tape
- Tape Guns
- Thermal Imager
- Tire And Window Markers
- Tool Trays
- Torque Tube
- Transmission Stands
- Transmission Tailshaft Plugs
- Tubing Bender Shoes
- Tubing Benders
- Tubing Notcher Components
- Tubing Notchers
- Tubing Straightener
- Vehicle Ramps
- Vinyl Doors
- Vise Jaw Inserts
- Vises
- Weather Stations and Accessories
- Welders
- Welding Clamps
- Welding Helmets
- Welding Pencil
- Work Tables
- Storage
-
Suspension Tuning
- All Suspension Tuning
- Aluminum Toe Plates
- Bump Steer Gauges
- Caster Camber Gauge Adapters
- Caster Camber Gauges
- Chassis Ride Height Gauges
- Chassis Ride Height Replacement Wear Rods
- Coil Spring Rate Tester Components
- Coil Spring Rate Testers
- Control Arm Fixture
- Plumb Bob Kits
- Scale Ballast Bladder
- Shock Drip Cups
- Shock Dyno
- Shock Inflation Tool
- Shock Travel Indicators
- Shock Valve Adjusting Tools
- Shock Vise
- Shock Wrenches
- Spindle Alignment Checking Tools
- Stagger Gauges
- Toe Gauges and Components
- Turn Plates
- Vehicle Scale Components
- Vehicle Scale Levelers and Roll Off Plates
- Vehicle Scales
-
Wheel and Tire Tools
- All Wheel and Tire Tools
- Bead Breakers
- Grinding Discs
- Groover And Siper Parts and Components
- Nitrogen Dryer
- Tire Durometer
- Tire Groovers and Sipers
- Tire Grooving and Siping Blades
- Tire Irons and Spoons
- Tire Preparation Stand Motors
- Tire Preparation Stands and Components
- Tire Pressure Gauge Components
- Tire Pressure Gauges
- Tire Sander Components
- Tire Sanders
- Tire Scribe
- Tire Tapes
- Tire Tread Depth Gauge
- Wheel
- Wheel Alignment Tools
- Wheel Wrenches
Reducer NPT 1/2in to 3/8in
ALLSTAR PERFORMANCE
-
ALLSTAR PERFORMANCE
|sku: ALL49773
Reducer NPT 1/2in to 1/8in
MSRP:Now: $6.99
ALLSTAR PERFORMANCE
|sku: ALL49771
Reducer NPT 3/8in to 1/8in
MSRP:Now: $5.99
ALLSTAR PERFORMANCE
|sku: ALL49772
Reducer NPT 3/8in to 1/4in
MSRP:Now: $5.79
ALLSTAR PERFORMANCE
|sku: ALL49778
Reducer NPT 3/4in to 1/2in
MSRP:Now: $10.59
ALLSTAR PERFORMANCE
|sku: ALL99031
Reducer Fitting 3/8in NPT to 1/4in NPT
MSRP:Now: $1.79
ALLSTAR PERFORMANCE
|sku: ALL49777
Reducer NPT 3/4in to 3/8in
MSRP:Now: $11.99
ALLSTAR PERFORMANCE
|sku: ALL49770
Reducer NPT 1/4in to 1/8in
MSRP:Now: $5.49
