Lucky us! We happened to get our paws on a crate Hemi-and the green light to run it to within an inch of its life on the dyno. Even better, we had a chance to bolt on a selection of go-fast goodies to ...

We test a variety of header sizes and types from Hooker on a 427ci big-block Chevy to show power trends and performance advantages. Tests include 1 ¾-inch long tube, 1 7/8-inch long tube, 2-inch long ...

Dyno testing a 2011 Corvette Grand Sport (manual) with TrickFlow Specialties LS3 cylinder heads and camshaft package, which is also equipped with long-tube headers and a custom tune from Greg Lovell ...

Just how much power can Supersprint exhaust headers add to an S54-powered BMW Z3M Coupe? In this video, we install a full header system and head straight to the dyno to find out. 🎧 Plus: hear that ...

We’ve fitted our BMW E46 M3 with Supersprint stepped headers, full Supersprint exhaust, and paired it with a custom Evolve ECU tune — now it’s time to hit the dyno and see the real gains. This is the ...

After more than two decades of flogging muscle motors on the dyno, Nick Panaritis thought he’d seen it all. But when a 472-cubic-inch Hemi arrived at his garage with a history as troubled as a street ...