s***, i'd love to dyno my car, except i don't think there is a single dyno in my town. I have some digimoto software coming tomorrow, that runs est. dynos, i'll post those they generally are pretty good at estimating.
not bad after conversion rate (about $550US). shipping is gonna be a killer though.
with the racing mazda header, you can get the midpipe and high flow cat for $150 from any muffler shop. then coating is another $150.
also, i notice the midpipe is 2.5" big. stock piping at the resonator is almost 2". most cat back exhausts are not much bigger than 2" at the resonator. the 2.5" midpipe is a waste unless you go full custom 2.5" catback exhaust.
cdglowred5 has the ES 4-2-1 header setup and he said it pulls from 2,500 rpm's to 7,000 rpm's. He will be dyno'ing it soon and im looking forward to seeing the results. heres a link to his thread:
Along with the ES 4-2-1, I have a Magnaflow cat-back coming as well. Both have been ordered I'm just awaiting their arrival. I wont be dyno'ing them, for I am broke after buying the parts, but I will be doing a video review on both of the products once they come in.
" Since putting on the header I have not thrown a CEL. The 2nd O2 bung is behind the High flow CAT on the midpipe. You have to get some extra wire or strtch your o2 slightly which I did.
Also if you have stock exhaust from second cat all the way back the gasket that is supplied did not work because the stock flange was a different size but the gasket does work. You turn it so no bolts go though and aplly some red high temp silcone and no exhaust leak..
The header is two piece for an easy install. There no gasket there because it is pressure fitted. The technolgy is from Honda.....
You will love the performance and it does make your car louder but not honda loud. Mustang guys said my car sounds nice...... "