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New Arrivals

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-08AN 120 Degree PTFE Reusable Hose End
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Vendor: RedHorse Performance-08AN 120 Degree PTFE Reusable Hose End
Sale price$21.99
-08AN 45 Degree Swivel-Seal Female Aluminum Hose End
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Vendor: RedHorse Performance-08AN 45 Degree Swivel-Seal Female Aluminum Hose End
Sale price$21.99
-08AN 90 Degree Swivel-Seal Female Aluminum Hose End
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Vendor: RedHorse Performance-08AN 90 Degree Swivel-Seal Female Aluminum Hose End
Sale price$20.99
-04AN 90 Degree Swivel-Seal Female Aluminum Hose End
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Vendor: RedHorse Performance-04AN 90 Degree Swivel-Seal Female Aluminum Hose End
Sale price$20.99
-06AN 90 Degree PTFE Reusable Hose End
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Vendor: RedHorse Performance-06AN 90 Degree PTFE Reusable Hose End
Sale price$18.99
-16AN male Single Inlet to Dual -16AN male Outlets
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Vendor: RedHorse Performance-16AN male Single Inlet to Dual -16AN male Outlets
Sale price$44.99
RedHorse Performance Vacuum Manifold, black Vacuum Manifold, black
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Vendor: RedHorse PerformanceVacuum Manifold, black
Sale price$59.99
-16AN 45 Degree Swivel-Seal Female Aluminum Hose End
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Vendor: RedHorse Performance-16AN 45 Degree Swivel-Seal Female Aluminum Hose End
Sale price$55.99
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Montly Brand Deals

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APR
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Mickey Thompson
Mickey Thompson
Dinan Performance
Dinan Performance

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Inspire and let yourself be inspired, from one unique fashion to another.

APR A02 Flow Formed - 19x8.5 - 5x112 - ET45 - 66.5mm Center Bore - Satin Black Wheel
APR A02 Flow Formed - 19x8.5 - 5x112 - ET45 - 66.5mm Center Bore - Satin Black Wheel
APR A02 Flow Formed - 19x8.5 - 5x112 - ET45 - 66.5mm Center Bore - Satin Black Wheel
Regular price $449.95 Sale price$358.95
APR 20-24 Audi Q7/Q8/RS Q8/SQ7/SQ8 (4M) 2.9T/3.0T/4.0T Forged Carbon Fiber Engine Cover
APR 20-24 Audi Q7/Q8/RS Q8/SQ7/SQ8 (4M) 2.9T/3.0T/4.0T Forged Carbon Fiber Engine Cover
APR 20-24 Audi Q7/Q8/RS Q8/SQ7/SQ8 (4M) 2.9T/3.0T/4.0T Forged Carbon Fiber Engine Cover
Regular price $1,968.95 Sale price$1,573.95

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Blog posts
Pump Gas vs E85 vs Methanol (M1 & M5): Choosing the Right Fuel for Your Build
STM Blogs
Pump Gas vs E85 vs Methanol (M1 & M5): Choosing the Right Fuel for Your Build
Read more
Wheel fitment and offset guide explaining positive, zero, and negative wheel offset, width, backspacing, tire clearance, stance, and performance fitment for aftermarket wheels.
STM Blogs
BBS Wheels, Fitment, Konig Wheels, Weld Wheels, Wheels, Wheels Offset
Wheel Fitment & Offset Explained: ET, Backspacing, and Spacers Without the Guesswork
Read more
Rubber vs. polyurethane vs. solid engine and transmission mounts comparison guide showing differences in vibration, performance, durability, powertrain movement, and best applications for street, track, and race vehicles.
STM Blogs
Energy Suspension, Engine Mounts, Polyurethane, suspension
Rubber vs. Poly vs. Solid Engine & Transmission Mounts: What's Right for Your Build
Read more
Rubber vs. polyurethane suspension bushings buying guide comparing handling, ride comfort, NVH, durability, and cost, featuring MOOG, Energy Suspension, and OEM bushings.
STM Blogs
Energy Suspension, Moog, suspension
Rubber vs. Polyurethane Suspension Bushings: A Buying Guide
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Stage 1, Stage 2, and Stage 3 clutch buying guide comparing clamp load, friction materials, drivability, heat capacity, and power handling for street and performance cars.
STM Blogs
ACT, Action Clutch, Clutches, Competition Clutch, McLeod Clutches
Stage 1, 2, 3 Clutches: What Actually Changes | Buying Guide
Read more
AN Fittings 101 beginner’s guide explaining AN fitting sizes, types, materials, hose compatibility, and selection tips for automotive fuel, oil, and coolant systems.
STM Blogs
AN Fittings, Brake System lines, Cooling Systems, DW, Fragola Performance, Fuel Systems, Vibrant Performance
N Fittings 101: Sizing, Threads, Angles, and Everything Else You Need to Know
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Coilovers blog post graphic, speed tuned motorsports
STM Blogs
Coilovers, Lowering springs, suspension
Coilovers vs Lowering Springs: Which Should You Choose?
Read more
Infographic comparing Whiteline performance suspension parts to stock suspension parts, highlighting improved grip, premium materials, and durability.
STM Blogs
endlinks, suspension, sway bars, Whiteline
Stock vs. Whiteline Performance Sway Bars & End Links: What's Actually Different?
Read more