One more set of dynos.
Given that we have some confidence of approximate equivalence in measures obtained from Z-fever's dynojet with those taken from Proven Power's, just for fun, here is a comparison of the Z's power with a totally stock exhaust system to its replacement, consisting of PPE LTH's and a Nismo cat back (both runs include K&N panel filters + smooth tubes).
Also note that the weather was very close for each run, which gives us further confidence that it is meaningful to compare one to the other with correction.
Yes, that is a massive gain of (up to) nearly 30 whp. Also, keep in mind the K&N filters and smooth tubes gave gains of another 5-10 over a bone stock Z, so these are pretty nice results from bolt-on's.
Looking forward to tuning
P.S. : After tuning I can also generate nice comparison graphs that should approximate a shootout between TP's and LTH's...