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How Turbochargers Work

Ever wondered how a turbocharger makes your engine produce more power?

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Porsche
Tech Tips: Porsche Boxster

Can you live with an older Boxster?

How Crack Checking and REM Polishing Can Better Prepare a Transmission for Track Use

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.

When Is It Time To Upgrade Your Clutch?

How well your car performs–and how nicely it drives–can often depend upon your clutch.

Aston Martin , Cadillac , Chevrolet , Ford , Pontiac
How to pick the right T-56 Transmission for your build–and your budget

Which Flavor of the Legendary T-56 Transmission Fits Your LS Swap-and Your Budget?

Turbo Boost Is Good, but Too Much Can Be Bad

Don't get us wrong: More boost is almost always more better. But there is such thing as too much boost.

Can Retrofitting Newer Injectors Really Provide a Quick, Inexpensive Power Bump?

Looking for an easy, low-buck power gain? Newer fuel injectors may be a quick fix.

Honda
What's the Diff? | Figuring Out Which Differential Setup Is Fastest on Track

Three differential approaches, three different answers.

How a Twin-Clutch Transmission Works

A gearbox for all drivers.

How to Pick the Right Gear Ratio for Your Needs

There are lots of ways to adjust gearing.

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