Subaru Impreza WRX STI Forums: - View Single Post - GR Stumble Mod Fix: GD Style Setup (not hose extension)
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Old 05-25-15, 01:49 PM  
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Default Re: GR Stumble Mod Fix: GD Style Setup (not hose extension)

Originally Posted by funks View Post
Don't even think the intake is worth it - I say you redirect that $$$ to an equal length header instead + up-pipe

Catted Downpipe + Up Pipe + Equal Length Header (stock catback, stock intake), keep the boost conservative (we are in California after all) and you get the following (stock intake). Tuned by Eric - only difference between the two is I went Equal (+ Up Pipe) with the blue line. Injectors per logging are below 90% IDC - so it's not maxed out.

I have the Grimmspeed Limited / Catted Downpipe (a bit pricey), Grimmspeed Up-Pipe, HKS Equal Length Header, get it Cerakoted locally and it's worth the price of admission.

Note: it's Virtual Dyno, not DynoJet but same tuner, same temp, same road, same driver.

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I'm still torn between going equal length or getting aftermarket unequal length header...
The benefits cylinder 2 and 4 are there and the torque but i dont know if I can give up the rumble... do you know if you get any gains from an aftermarket unequal length header?
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