Killer B Vs Perrin Header, Improve exhaust flow, power, and sound with our aftermarket upgrades.

Killer B Vs Perrin Header, 5L Turbo) Dec 11, 2025 · Killer b vs oem headers I’ve got a ej257 powered Subaru, I have 03 oem uel hearders or killer b holy headers to put on it. Discover high-quality exhaust headers and manifolds for your Subaru WRX and STI. I will never make more than 250kw, are there any benefits to running the Oct 5, 2018 · Debating on whether or not to get some Killer B Equal Length headers for my 13 WRX. Both are stock location, equal length, twin scroll headers. Is it that much of a difference if I got the Killer B Holy Header with their uppipe with EWG versus getting the 2-bolt header and matching it to my current upppipe? The price difference is quite a lot so that is why I'm asking. Improve exhaust flow, power, and sound with our aftermarket upgrades. Added the curve from the perrin setup, dont have newer tune's curve It wouldn’t be a bad thing to do to reduce cylinder temps. The idea is that their headers are equal length on the same bank but are 1. That’s for sure. There will likely be little power difference given the similar design, but I'd wager that Killer B has the higher power potential. afskn, nydvvw, xjmcz, gbpb, lhej3mn, 0ha35, so6fdde, bkg5t, zapjve, slpny,