British sports-car owners expect to see oil spots on their concrete. Like fast food and cholesterol, this comes with the territory. Fortunately, American engine-sealing technology makes newer Detroit ...

It's no secret that GM's LS engines have become the hottest powerplant in the aftermarket. They're compact, they have great cylinder heads, and they are ubiquitous. Everyone knows that the quickest ...

To some, replacing valve covers to cure leaky gaskets is like throwing out the baby with the bath water: New gaskets will likely solve the problem. However, shoddy gaskets provide an opportunity for ...

Oil seeping from the front of your engine rarely starts as a dramatic failure. It usually begins as a slow weep at the timing cover that stains your driveway, lowers oil level, and quietly raises the ...

There are instances where OEM design is so good that it lends itself to a broad range of applications within the high-performance aftermarket. Some good examples are the Mustang II frontend, Corvair ...