Equal-length steel tubing headers continue to be among the best horsepower/dollar investments an enthusiast can make, with properly designed headers offering at least a 20-30-horsepower increase, as ...

If you plan to upgrade your car on a budget, most car enthusiasts often start with the engine's air intake system and a performance exhaust. Add-ons like a cold air intake or a straight pipe will let ...

Exhaust Manifold Bolt Holes: Why So Few?I have an original '78 WS6/W72 T/A that has been stored for a number of years. While getting it roadworthy, I found an exhaust leak between the driver-side ...

Exhaust manifold bolts help form a seal between the block and the manifold. However, these bolts can fail over time. Here's why that can happen.