Exhaust Question

[baysideblue14]

Ok need some words of advice here,

I currently own a r34 gtt, which has a 3 inch front pipe, hi flow cat and 3 inch apexi cat back exhaust. I am not happy with the 3 inch exhaust as it is off a gtr and sits very low and scrapes over any little bump in the road.

So anyway I have a 3.5 inch fujitsubo cat back exhaust sitting in the garage, it does not bolt up to the cat because the flange is too big for it. I am looking to upgrade the turbo to a hypergear high flow, bigger pump and injectors etc..

Should I:

1. Fit the 3.5 inch cat back to the 3 inch system already on the car, will this effect sound, performance by much?
2. Remove the 3 inch system fit the 3.5 inch cat back and have a 3.5 inch dump pipe, front pipe and hi flow cat made up/bought? Is a 3.5 inch system over kill for my setup?

Any serious advice is appreciated.

[75coupe]

Cut and reweld the brackets holding the current 3" system so it sits higher, and exhaust shop could do this or if you have a welder you could do it yourself, alot cheaper and makes more sense than having to stuff around with flanges to attempt fitting a 3.5" cat back...

3" is plenty for the flow youll get out of a highflow turbo too

[GTR-N1]

And what's your location so that there's someone we can recommend?

[baysideblue14]

Im in Western Sydney

[mad082]

Cut and reweld the brackets holding the current 3" system so it sits higher, and exhaust shop could do this or if you have a welder you could do it yourself, alot cheaper and makes more sense than having to stuff around with flanges to attempt fitting a 3.5" cat back...

3" is plenty for the flow youll get out of a highflow turbo too

This is spot on

[baysideblue14]

Thank you for the advice everyone, will take it to a exhaust shop and have the hangers rewelded.