:: Crucial Racing Systems - The parts you need for the performance you want

Crucial Racing P&P&C Manifolds

It all starts with the OEM cast iron exhaust manifold elbows from a 2002-2005 WRX or 2004-2007 STI (they're identical). We then port the manifolds all the way through to increase the interior diameter and smooth the surface. This means vastly increased exhaust flow with less turbulence! After porting is complete, the manifold elbows go through our famous thermal barrier coating process to keep that heat inside of the exhaust where it belongs, giving you quicker turbo spool-up, better response, lower underhood temperatures, and more power. Clearly this is an improvement vs totally stock OEM manifolds, but why choose Crucial's P&P&C manifolds over aftermarket stainless headers?

OEM manifolds mean perfect fitment and extreme reliability. Cracked stainless headers are a big problem, but these iron manifolds are practically indestructible!
Clean, deep exhaust note. Thick cast iron doesn't resonate like thin steel piping, and you end up with a cleaner, deeper exhaust tone vs. the metallic raspy tones that typically come from 'headers.'
Thanks to the great heat retention and short piping length, spool-up and response are almost always significantly better than w/ aftermarket headers. Also due to the heat retention and our coating, you can expect MUCH lower underhood temperatures vs headers (lower intake temps, lower intercooler temps) and lower oil temperatures.
HP and TQ numbers are competitive with aftermarket headers! It depends on your setup and your tune, but on average the numbers are extremely close. Some cars make a couple less ponies, some a couple more. But... it's almost always the case w/ the P&P&C manifolds that boost comes on sooner so you have a broader torque band.
Stealth. The OEM heat shields fit right back on so visually there is no difference whatsoever vs stock manifolds.
Price is much lower than headers!

Crucial's P&P&C Manifolds set records! Our manifolds (and downpipe, racepipe, thermostat, and springs, actually!) are on the 2006 STI that still holds the North American record for quickest and fastest 1/4 mile time (11.7x) on the stock turbo. Our P&P&C manifolds are also on the second quickest and fastest stock turbo STI! Besides these and other drag racing cars, Crucial's P&P&C manifolds can be found on rally cars competing in the Targa Newfoundland, road racing cars competing all over the US and Canada, and, of course, on street cars.

How does it work??? We send you a pair of finished P&P&C manifold elbows. You install them on your car. Then you ship your stock elbows back to us. That's it!

CORE FEE: Built into the price below is a $100 core fee. This fee gets refunded in full as soon as your stock manifold elbows arrive back here. PLEASE return your elbows (and preferably in a somewhat timely fashion). It is the only way we can make an exchange program like this work.

Please note we do NOT accept 06-08 WRX or any year Forester XT manifolds! These models received narrower manifolds with different bends and they simply do not work as well. If you have one of these models and are interested in P&P&C of your manifolds, please contact us. But do NOT purchase the manifolds below unless you have 02-05 WRX or 04-08 STI ones to return to us. Thanks.

^^^ during porting ^^^ complete