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clutch , transmission , Shop Work
Should you upgrade your clutch?

How well your car performs–and how nicely it drives–can often depend upon your clutch. Here's how to tell if it's time for an upgrade.

BimmerWorld | clutch
Is your clutch pedal slowing you down?

Want to go 3-4 mph faster down the straights after installing a simple $20 part? BimmerWorld offers that advantage.

David S. Wallens
Mazda | Miata | supercharged | junkyard | Mazda Miata | supercharger | supercharge
How to add inexpensive power with a salvage yard supercharger

No movie magic, no special effects. For less than $200 we put together our own supercharger setup.

Carl Heideman
Air Intake
What design make the best air intake?

We built (and actually tested) different intake designs.

Carl Heideman
Toyota | MR2 | Toyota MR2 | fuel injector
Can blueprinting old fuel injectors really increase performance?

One of the first things we do whenever we pick up an older car? Go through the fuel system.

Tom Suddard
Chevrolet | Corvette | transmission | GearFX
Making a gearbox track-ready with crack checking and REM polishing

Transmission internals are subject to intense stresses. Crack checking and polishing can help ensure that those stresses don’t lead to failures down the road.

J.G. Pasterjak
Oil | Engine Oil | autoccross
All about oil for street and autocross use

We ask various experts in the engine oil industry questions most commonly fielded by automotive enthusiasts.

David S. Wallens
Sunoco | Fuel Tips | Sponsored Content
Is E30 a hack for extra octane?

Want more power, but don't want to go from straight gas to E85? There's a middle ground. Consider E30.

Sunoco Fuels
Oil
Straight talk on oil for track and race use

We ask various experts in the engine oil industry questions most commonly fielded by automotive enthusiasts.

David S. Wallens
BMW | e30 | Biodiesel
#TBT: This E30 BMW racer runs on biodiesel

Although this BMW looks like any other E30 racer, this one runs on biodiesel.

Marjorie Suddard
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