Performance Auto Parts for LS Swaps, Muscle Cars & Modern Builds

Shop thousands of in-stock performance parts from trusted brands—engine upgrades, suspension, exhaust, fuel systems, and more. Fast shipping and real-world support from fellow car enthusiasts.

Proform Engine Valve Cover Hold Down Tab 141-757

$26.95
BCHW_141-757
All Cylinder Block Components Engine Engine Covers, Pans and Dress-Up Components Engine Valve Cover Hold Down Tab Engines and Components Proform Sale Valve Cover Hold-Down Tabs
Premium Black crinkle hold down clamps with distinctive look and boldly striking Bowtie Emblems, inlaid with classic Chevrolet red, are CED painted for long-term...

Proform Engine Crankcase Breather Cap 141-754

$21.95
BCHW_141-754
All Emission Control Engine Covers, Pans and Dress-Up Components Engine Crankcase Breather Cap Engines and Components Hardware, Fasteners and Fittings Proform Sale Valve Cover Breathers and Components
This engine valve cover breather has a 3 inch overall diameter and is 2.50 inches tall. It includes a raised Chevrolet Bowtie logo emblem...

Proform Engine Valve Cover Hold Down Tab 141-782

$26.95
BCHW_141-782
All Cylinder Block Components Engine Engine Covers, Pans and Dress-Up Components Engine Valve Cover Hold Down Tab Engines and Components Proform Sale Valve Cover Hold-Down Tabs
Give your engine a truly unique and striking look. These steel parts are electrostatically painted and baked with durable high-tech, orange epoxy, finished with...

Proform Valve Covers; Slant-Edge Tall; Die Cast; Gray w/Raised Bowtie Logo; For SB Chevy 141-925

$333.54 $317.95
BCHW_141-925
.ValveCoversEngineCovers All Cylinder Block Components Engine Engine Covers, Pans and Dress-Up Components Engine Valve Cover Engines and Components Proform Sale Valve Covers
New in 2009! These innovative valve covers have an aggressive design that will make your engine stand out at the show. These premium die-cast...

Proform Sold As One Set Of Four Pieces 141-902

$31.95
BCHW_141-902
All Engine Engine Fastener Kits Engine Valve Cover Nut Fasteners Hardware, Fasteners and Fittings Proform Sale Valve Cover Fastener Kits
Premium Chrome Wing Nuts. Chevrolet Bowtie Emblem is cut sharply into the top of each wing nut then inlaid with classic Chevrolet red. The...

Proform Engine Dress-Up Kit; Black Crinkle Finish; Red Bowtie; Red Letters; For SB Chevy 141-758

$317.95
BCHW_141-758
Accessories All Dress-Up Kits Engine Covers, Pans and Dress-Up Components Engine Dress Up Kit Engines and Components Proform Sale Underhood Accessories
Black crinkle valve covers, with their distinctive look and boldly striking Bowtie and CHEVROLET Emblems, inlaid with classic Chevrolet red, are CED painted for...

Proform Engine Valve Cover 141-787

$158.95
BCHW_141-787
.ValveCoversEngineCovers All Cylinder Block Components Engine Engine Covers, Pans and Dress-Up Components Engine Valve Cover Engines and Components Proform Sale Valve Covers
Latest Look! For Chevrolet big-block engines, V8, 1965-96. These tall stamped steel valve covers are electrostatically painted and baked with a durable high-tech, orange...

Proform Valve Covers-Orange 141-841

$317.95
BCHW_141-841
.ValveCoversEngineCovers All Cylinder Block Components Engine Engine Covers, Pans and Dress-Up Components Engine Valve Cover Engines and Components Proform Sale Valve Covers
The center bolt family of valve covers now can enjoy the wildly popular Slant-Edge look that Gen 1 and LS enthusiasts have been enjoying....

Proform Valve Covers; Slant-Edge Tall; Die Cast; Black w/ Raised Bowtie Logo; SB Chevy 141-921

$317.95
BCHW_141-921
.ValveCoversEngineCovers All Cylinder Block Components Engine Engine Covers, Pans and Dress-Up Components Engine Valve Cover Engines and Components Proform Sale Valve Covers
These innovative valve covers have an aggressive design that will make your engine stand out at the show. These premium die-cast aluminum valve covers...

Proform Engine Valve Cover 141-840

$327.96 $317.95
BCHW_141-840
.ValveCoversEngineCovers All Cylinder Block Components Engine Engine Covers, Pans and Dress-Up Components Engine Valve Cover Engines and Components Proform Sale Valve Covers
The center bolt family of valve covers now can enjoy the wildly popular Slant-Edge look that Gen 1 and LS enthusiasts have been enjoying....

Proform Valve Covers-Orange 141-924

$317.95
BCHW_141-924
.ValveCoversEngineCovers All Cylinder Block Components Engine Engine Covers, Pans and Dress-Up Components Engine Valve Cover Engines and Components Proform Sale Valve Covers
These innovative valve covers have an aggressive design that will make your engine stand out at the show. These premium die-cast aluminum valve covers...

Proform Chevy Lettering w/Bowtie Nut 141-752

$108.45 $105.95
BCHW_141-752
.AirFuelDelivery Air and Fuel Air and Fuel Delivery Air Cleaner Assemblies and Air Intake Kits Air Cleaner Assembly Air Cleaners, Filters, Intakes and Components All Carburetion Proform Sale
This carburetor air cleaner kit is a 14 inch diameter and features a Chevrolet lettering on the top cover. Also included is a Bowtie...

Proform Engine Crankcase Breather Cap 141-854

$41.95
BCHW_141-854
All Emission Control Engine Covers, Pans and Dress-Up Components Engine Crankcase Breather Cap Engines and Components Hardware, Fasteners and Fittings Proform Sale Valve Cover Breathers and Components
No more stamped steel breather caps for aluminum valve covers! Complete your engine dress-up look with a breather cap that actually matches your look!...

Proform Engine Crankcase Breather Cap 141-859

$41.95
BCHW_141-859
All Emission Control Engine Covers, Pans and Dress-Up Components Engine Crankcase Breather Cap Engines and Components Hardware, Fasteners and Fittings Proform Sale Valve Cover Breathers and Components
No more stamped steel breather caps for aluminum valve covers! Complete your engine dress-up look with a breather cap that actually matches your look!...

Proform Valve Covers-Polish 141-927

$317.95
BCHW_141-927
.ValveCoversEngineCovers All Cylinder Block Components Engine Engine Covers, Pans and Dress-Up Components Engine Valve Cover Engines and Components Proform Sale Valve Covers
Valve Cover - Slant-Edge - Tall - Baffled - Breather Hole - Recessed Chevrolet Bowtie Logo - Aluminum - Polished - Small Block Chevy...

Proform Engine Crankcase Breather Cap 141-850

$37.95
BCHW_141-850
All Emission Control Engine Covers, Pans and Dress-Up Components Engine Crankcase Breather Cap Engines and Components Hardware, Fasteners and Fittings Proform Sale Valve Cover Breathers and Components
No more stamped steel breather caps for aluminum valve covers! Complete your engine dress-up look with a breather cap that actually matches your look!...

Proform Valve Covers-Chrome 141-813

$157.95
BCHW_141-813
.ValveCoversEngineCovers All Cylinder Block Components Engine Engine Covers, Pans and Dress-Up Components Engine Valve Cover Engines and Components Proform Sale Valve Covers
These CHEVROLET Bowtie valve covers are made of heavy-gauge steel, 20% thicker than typical aftermarket valve covers, greatly reducing the likelihood of leakage around...

Proform Engine Crankcase Breather Cap 141-862

$37.95
BCHW_141-862
All Emission Control Engine Covers, Pans and Dress-Up Components Engine Crankcase Breather Cap Engines and Components Hardware, Fasteners and Fittings Proform Sale Valve Cover Breathers and Components
No more stamped steel breather caps for aluminum valve covers! Complete your engine dress-up look with a breather cap that actually matches your look!...

Proform Raised Chevy and Bowtie Emblems 141-830

$180.95
BCHW_141-830
.AirFuelDelivery Air and Fuel Air and Fuel Delivery Air Cleaner Assemblies and Air Intake Kits Air Cleaner Assembly Air Cleaners, Filters, Intakes and Components All Carburetion Proform Sale
NEW Slant-Edge Air Cleaners are the perfect way to complete your dress-up look in premium Slant-Edge style. Initially six of the most popular styles...

Proform Engine Valve Covers; Stamped Steel; Tall; Black; w/ Bowtie Logo; Fits BB Chevy 141-811

$158.95
BCHW_141-811
.ValveCoversEngineCovers All Cylinder Block Components Engine Engine Covers, Pans and Dress-Up Components Engine Valve Cover Engines and Components Proform Sale Valve Covers
These CHEVROLET Bowtie valve covers are made of heavy-gauge steel, 20% thicker than typical aftermarket valve covers, greatly reducing the likelihood of leakage around...

Proform Air Cleaner Assembly 141-693

$105.95
BCHW_141-693
.AirFuelDelivery Air and Fuel Air and Fuel Delivery Air Cleaner Assemblies and Air Intake Kits Air Cleaner Assembly Air Cleaners, Filters, Intakes and Components All Carburetion Proform Sale
super-deep aluminum base for maximum clearance. These weight-saving high-performance air cleaner kits blend traditional OEM appearance profiles with optimized air-flow dynamics to achieve checkered-flag...

Proform Chevy Lettering with Bowtie Nut 141-302

$97.78 $90.95
BCHW_141-302
.AirFuelDelivery Air and Fuel Air and Fuel Delivery Air Cleaner Assemblies and Air Intake Kits Air Cleaner Assembly Air Cleaners, Filters, Intakes and Components All Carburetion Proform Sale
This engine carburetor air cleaner kit is a 14 inch diameter and features a stamped "Chevrolet" lettering on the top cover. This "Classic" style...

Proform Air Cleaner Mounting Nut 141-323

$15.90 $14.95
BCHW_141-323
Air and Fuel Delivery Air Cleaner Fastener Kits Air Cleaner Mounting Nut All Engine Fastener Kits Fasteners Hardware, Fasteners and Fittings Proform Sale
Premium Air Cleaner Nuts. Available with the distinctive GM and Chevrolet Bowtie Trademarks, these chrome plated zinc die-cast air cleaner center nuts are offered...

Proform Sold Individually 141-660

$159.95
BCHW_141-660
All Alternator Alternator / Generator and Related Components Alternators/Generators and Components Charging Systems Electrical, Charging and Starting Ignitions and Electrical Proform Sale
It is now possible to obtain four sought-after and popular features in one alternator! 100% NEW with absolutely no re-built components. Assured quality with...

Proform Engine Valve Cover Hold Down Tab 141-610

$22.95
BCHW_141-610
All Cylinder Block Components Engine Engine Covers, Pans and Dress-Up Components Engine Valve Cover Hold Down Tab Engines and Components Proform Sale Valve Cover Hold-Down Tabs
Premium Chrome Valve Cover Hold-Down Clamps. By spreading the load over a wider area, this clamp minimizes distortion of the valve cover flanges, thereby...

Proform Fits Small Block Chevy using 8 Inch Balancer 141-202

$8.95
BCHW_141-202
All Engine Engine Covers, Pans and Dress-Up Components Engine Timing Tab Engines and Components Proform Sale Timing Pointers Valve Train Components
Engine Timing Tab; Chrome Finish; Fits 1955 to 2000 Small Block Chevy 262-400 Engines Using An 8 Inch Harmonic Balancer; Made From High-Quality Steel;...

Proform Engine Crankcase Breather Cap 141-616

$15.95
BCHW_141-616
All Emission Control Engine Covers, Pans and Dress-Up Components Engine Crankcase Breather Cap Engines and Components Hardware, Fasteners and Fittings Proform Sale Valve Cover Breathers and Components
This engine valve cover breather has a 3 inch overall diameter and is 2.50 inches tall. It includes a raised Chevrolet "Bowtie" logo emblem...

Proform Electric Water Pump 141-674

$344.39 $239.95
BCHW_141-674
.WaterPumps All Belts and Cooling Cooling & Heating Engine Water Pump Heating and Cooling Proform Sale Water Pump and Related Components Water Pumps Water Pumps - Electric
Eliminates unnecessary weight and impeller-drag experienced at high RPM, pumps up to 35+ gallons of water per minute, and delivers the cooling that can...

Proform Sold Individually 141-656

$149.95
BCHW_141-656
All Alternator Alternator / Generator and Related Components Alternators/Generators and Components Charging Systems Electrical, Charging and Starting Ignitions and Electrical Proform Sale
It is now possible to obtain four sought-after and popular features in one alternator! 100% NEW with absolutely no re-built components. Assured quality with...

Proform Engine Coolant Thermostat Housing 141-501

$26.95
BCHW_141-501
.Thermostats All Belts and Cooling Cooling & Heating Engine Coolant Thermostat Housing Heating and Cooling Proform Sale Thermostat and Housing Thermostats, Housings and Fillers Water Necks - Thermostat Housings
Premium Chrome Water Neck. This Chevrolet water neck utilizes neoprene O-ring gaskets instead of regular gaskets eliminating leakage. Supplied with chrome bolts.Proform Engine Coolant...

Proform Engine Crankcase Breather Cap 141-622

$29.95
BCHW_141-622
All Emission Control Engine Covers, Pans and Dress-Up Components Engine Crankcase Breather Cap Engines and Components Hardware, Fasteners and Fittings Proform Sale Valve Cover Breathers and Components
These popular push-in filter air breathers, with the raised Bowtie Emblem stamped prominently in the top, are offered in two styles: with the heat-shield...

Proform Spark Plug Wire Holder 141-639

$133.81 $114.95
BCHW_141-639
All Ignition Ignition Wire and Related Components Ignitions and Electrical Proform Sale Spark Plug Wire Holder Wire Looms Wiring Components
311,487. 1 pair per package. Technical Note: Before purchasing, check exhaust manifold for correct usage. For clearance reasons, the manifold must not be much...

Proform Air Cleaner Mounting Nut 141-327

$15.90 $14.95
BCHW_141-327
Air and Fuel Delivery Air Cleaner Fastener Kits Air Cleaner Mounting Nut All Engine Fastener Kits Fasteners Hardware, Fasteners and Fittings Proform Sale
Premium Air Cleaner Nuts. Available with the distinctive GM and Chevrolet Bowtie Trademarks, these chrome plated zinc die-cast air cleaner center nuts are offered...

Proform Raised "LSX" Emblem Aluminum Valve Covers, Black Crinkle, LS Engines 141-256

$317.95
BCHW_141-256
.ValveCoversEngineCovers All Cylinder Block Components Engine Engine Covers, Pans and Dress-Up Components Engine Valve Cover Engines and Components Proform Sale Valve Covers
Through innovative engineering, PROFORM has developed a valve cover that will take your generic looking stock LS engine, and give it a totally personalized...

Proform Sold As One Set of Four Pieces 141-601

$21.95
BCHW_141-601
All Engine Engine Fastener Kits Engine Valve Cover Nut Fasteners Hardware, Fasteners and Fittings Proform Sale Valve Cover Fastener Kits
These custom valve cover mini nuts feature a Bowtie logo on the top of each fastener. Separate studs are included for precise gasket positioning....

Proform Electric Engine Water Pump; Aluminum; Black with Bowtie Logo; Fits SB Chevy 141-651

$219.95
BCHW_141-651
.WaterPumps All Belts and Cooling Cooling & Heating Engine Water Pump Heating and Cooling Proform Sale Water Pump and Related Components Water Pumps Water Pumps - Electric
Eliminates unnecessary weight and impeller-drag experienced at high RPM, pumps up to 35+ gallons of water per minute, and delivers the cooling that can...
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