Originally Posted by idrm350
Wait, Willy, where are the cut outs on your exhaust? I've thought about doing this after the resonators in the mid pipes but before the rear cans on my Injen system...
I took test pipes, cut them in half, and welded in a "Y" piece--one way goes straight back to the exhaust, the other way goes to the butterfly valves...when you open them up, it roars...otherwise, stock silent.
I took them out because I made my current TD 3". I just saw the test pipes sitting in the garage the other day, made me smile, I had completely forgot about them. ...so pretty much, they just replace the stock cats...direct bolt on...
They new butterfly valves, but you can get those anywhere, they're made by QTP and are direct bolt on to the end of the Y pipe... just run the wire up into the car (I had it in my center console), and flip the switch when you wanna open them up... I got some pretty crazy looks when I was about to race people... the car looked stock from behind, then all of the sudden all hell would open up, lol...
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Daily Driver (65k miles): APS Intercooled TT, Built Motor, Arias, Eagle, HKS, UTEC, Deutschworks, Wilwood BBK, MB Weapons, Nito NT 555RII, ACT clutch, Fidanza flywheel, KW Variant 3 coilovers, Hotchkis sways, Cusco control arms, Authentic JDM Spec Nismo V2 body kit, Z Speed, Quiafe, HID, AIT R1 Hood, HKS EVC, HKS Hi Flow, custom 3" TD exhaust, APS 3.5" down pipes, GReddy, Defi, AEM