Invidia Equal Length Big Piping Exhaust Manifold - Subaru Models (inc. 2002-2014 WRX / 2004+ STI)
Manufacturer Part # HS05SW1HDP
Bundle Savings:MSRP: $1,548.00
The Invidia Equal Length Big Piping Exhaust Manifold is made for those of you looking to make big horsepower and big torque numbers. This is a one-piece design that has been fabricated from SUS 304 stainless steel, and the flanges feature CNC machined to hinder warping, and to ensure for a precision fitment.
This header has a pair of O2 provisions for installation of the factory oxygen sensor, as well as an option to install an aftermarket wideband gauge. New exhaust manifold studs will be included to help for installation.
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To anyone that is concerned about boost creep when changing exhaust.
Strycn1n3 5 years ago
I have seen many people concerned about boost creep when upgrading their exhaust system. I'm very confident that the reason i've seen no boost creep in my system is attributed to these headers. Equal length means more even flow to the turbo and also these headers are designed with the stock cam in mind. They are perfectly oversized to the size of the heads in such a way that they are like a stepped tube header. They may decrease velocity of the exhaust slightly but its made up for in the even delivery to the turbo making them better than similar headers in their class. I always reach the appropriate boost for the map even with a catless TBE. I have these headers + invidia n1 race catless exhaust all the way back running Cobb stage 2 + sf with no problems for about a year now. IMHO these are the best possible headers you can get for the stock turbo regardless of the decreased velocity because you will reach the boost you want all the time with no fluctuations.
Strycn1n3 6 years ago
These bad boys are sized perfectly to get a much HP/TQ out of the stock exhaust valve size as possible plus a little more even from slightly ported and larger valves. Can't wait to get them and put them on next week! My goal for now on my MY12 WRX is to gain more low end TQ due to the fact that stockers dont really like to launch as well as they should. Can't ask for a better design for stock or slightly oversized valves.
Does not fit Moroso oil pan
hot-j 6 years ago
I bought these headers to be used in conjunction with a aluminum moroso oil pan. They did not fit togeather, so one had to go. I chose the pan over the headers because the additional HP I would gain by using these did not out-weigh the extra reliability of the moroso oil pan. Why the 5 stars then? Because although I couldnt use them, the overall build quality was exellent, and in my opinion the best HP TQ making design out there. Ended going with the Invidia HS02 to fit my pan.
QUESTIONS & ANSWERS
Q: Subie Rumble (equal Vs. un-equal length) J.Hick 3 months agoAnswer
I've head from multiple sources that equal length headers will get rid of the boxer rumble? Not completely eliminate it but make it more subtle. Trying not to lose that rumble, want to know if I should get an un-equal length or equal length?
A: You will lose the "boxer rumble" with equal length headers but will gain more top end power.
Luis L. 3 months ago
Q: Comparison to Perrin big tube Specter 7 months agoAnswer
I was wondering if these headers where specifically made for cars running more than 500hp. Like the Perrin big tube headers they are designed for cars running a rotted set up or 500+hp.
A: These headers aren't specifically designed for high HP making vehicles but for all turbo modeled Subaru's. They can hold that much power but weren't made particularly for them.
Tyler A. 7 months ago
Q: Up Pipe Robicheaux 1 year agoAnswer
Im assuming that these headers dont require any kind of up pipe at all. Im ead to beleive that due to the picture. is that correct?
A: Yes, That is correct. this PN: HS05SW1HDP Header already included the Up-pipe. If you looking for the header that without the up-pipe PN: HS05SW1HDR Our Race header don't have up-pipe. you have to purchase the up-pipe separately.
[email protected] 1 year ago
Q: Ewg eggemeyerzm34940 3 years agoAnswer
Does the piping come with a ewg port? Or just for an iwg
A: This does not have an EWG flange.
Nick S. 3 years ago