4.5" Cat And 4" Dump

[sambo_xr6t]

hey guys is it fine to just run a 4.5" high flow cat and a 4" dump pipe or do I need remove center muffler or any thing else I need to do cheers heaps

[IH8TOADS]

leave the centre muffler on in this case or it will sound very average, you could try replacing the centre muffler with hotdogs and it should sound ok while still having good flow.

[sambo_xr6t]

thanx man so if I put high flow cat in hot dog and dumpie I should be all right than ?

[sambo_xr6t]

any 1 so if I run a 4.5" cat replace mufler with hotdog and 4" dumpy should be fine ?

[djkice]

are you getting it tuned as well? injectors etc?

[sambo_xr6t]

yea man like flash tuner injectors fuel pump and so forth its either I get full exhaust system and no inter cooler or I get cat and dump and get inter cooler

[djkice]

cat dump cooler seems like better option imo

[aussie_dozer]

If you upgrade the dump & cat you will need to do your wastegate & acctuator to control / stop boost spike, due to you freeing up the exhaust system. I would say just fit the cat and leave the rest of the system so your tuner wont have to deal with massive boost spike issues.

Spend the rest of your money on a high flow cooler, injectors and tune. Should see you 320rwkw..

[Adam]

Not in my case...

I've got a XFroce dump and cat with no wastegate mods or actuator running 300rwkw's with no boost problems.

[XtRmn8]

Adam, split dump of the straight 4"?