What's old seems to be new again at Chrysler. and when old refers to the revival of Hemi power plants in production Mopars, we definitely call it a positive trend. The 5.7-liter Hemi engine came onto the scene with a vengeance. Replacing the very good 5.9-liter Magnum engine (that's a 360 for us old-time, non-metric guys), Chrysler raised the bar substantially with the new Hemi. With a class-leading 345 SAE net horsepower on tap, the output is a staggering 100 hp greater than the previous engine's 245. That Chrysler's newest mill is blessed with the legendary Hemi configuration is just the icing on the cake.

With all that horsepower on tap, it's only natural that hardcore power junkies would look for more. In the old days, finding more power was easy to do, but with many of today's highly developed engines, Detroit didn't leave a lot of easy-to-get horsepower on the shelf. But that is not enough to stop the aftermarket from trying, and often succeeding, in taking a good OE package and making it better.

We heard Edelbrock was developing tubular exhaust headers for the 5.7 Hemi, and we decided to stop by their R&D facility for a first-hand look. In the old days, you could take just about any engine, slap on a set of headers, and reap substantial rewards in increased output. These days, we've seen numerous exhaust tests where ditching the factory equipment barely goosed output enough to be worth mentioning. We have to confess to not being familiar with the 5.7 Hemi's factory-fitted exhaust manifolds, so we really didn't know what to expect.

We had the opportunity to see the prototype installation of Edelbrock's Hemi headers and were impressed with the quality and fit. There was no denying they are nice pieces. More importantly, we had a chance to see for ourselves on the dyno what they were worth, and the numbers were impressive. Here's the lowdown on what we found out.

SOURCE
Edelbrock
Dept. 5.0
2700 California St.
Torrance
CA  90503
310-781-2222
www.edelbrock.com