Quote:
Originally Posted by tom @ eas
ESS is correct - we typically don’t see strong supercharged results when using FI, iPE, Armytrix, or Valvetronic exhaust systems on the dyno. While these systems are generally on the louder side, they don’t tend to perform particularly well, mainly due to their x-pipe or valved muffler designs, which often create choke points.
The x-pipe is actually the most restrictive portion of the OEM exhaust. We’ve consistently seen the best performance results using a Macht Schnell x-pipe paired with the factory mufflers.
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What kind of variance are we talking about? 3-5hp difference or more?