wrx_2005

Hi

would there be any power loss from changing back to stock 2.5" centre pipe which has the resonator.

I have a 3" centre decat pipe fitted but I think its knocking against the side as there is no clearance around the pipe.

I have all 3 CATS removed, and rear box pipework is 2.5" bore.
Headers/Up-pipe are also ported (thanks to Harvey Smith - RIP)

I just don't want to see any drop in performance.

your thoughts ?

wrx_2005

84 views and no reply ??? come on guys, anybody out there ?

M2RTXhawkeye

iTrader: (61)

Did you have it mapped mate when you removed the cats?

Martin

wrx_2005

hi, yes, had a map tweak done, to take into account the further mods, ie, the decat downpipe, ported headers etc. i think decided to keep the 3" centre pipe and going to get it on ramp to see if it can be aligned correctly, I believe it is touching the propshaft, hence the knocking sound on low speed. i am determined to get it fixed.

M2RTXhawkeye

iTrader: (61)

I would imagine changing the centre pipe will need another map tweak mate. Best find the cause of the knock an deal with that as that's a cheaper option lol

Martin

wrx_2005

M2RTXhawkeye

iTrader: (61)

Check the centre pipe isn't knocking the heat shields mate if they touch slightly there would be an annoying knocking sound. If that's the case just bend them away from the pipe and hopefully that should be job done

Martin

wrx_2005

thanks, going to get it up on ramp tmrw at my local exhaust fitting centre, will let you know what they found and did.