Hey guys, im thinking about purchasing a HKS titanium race series cat back exhaust. how well would it bolt up to my current RMM downpipe?? also, does HKS make a downpipe to match the piping diameter?? thanks for any info
-97supraTT

1997 Supra TT (6spd)
-Greddy Power Extreme Exhaust
-Greddy BCC
-Greddy profec-b boost controller
-HKS turbo timer
-HKS super sequential bov
-RMM downpipe
-Iceboxx intake with K&N
-Unorthodox cams

It will bolt up fine. M-V-P is the only place that sells a 4" DP. If you aren't planning to make 800+rwhp, I'd just stick with a 3-3.5". Lots less torque will be lost.

You won't lose any torque if you go with a 4" DP. The bigger, the better on the Supra. However, at BPU level, you won't be able to take advantage of the bigger diameter of the DP and exhaust. It does make a very nice sound though!!

-Olivier

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I guess I'll be surfing here until...I get tired of it!

To tell you the truth, i've been asking the same question but get no replies, but what ive heard is that the RMM dp can fit the Hiper Ti.
Right now all my car has is a boost cont. and a afc and a apexi ITC which came with the car when I bought it(don't know if I need it). You could probably custom fabricate your existing dp to fit a Hiper Ti.