pros and cons to 4" vs 5" exhaust system
were is the best place to by
do I need to change the down pipe does 4" give more hp how much hp and mpg can I expect if any? Thanks for any help ---AutoMerged DoublePost--- correction does 5" give more hp |
all 5 does is make it sound deeper ... as for mpg and horses u wont see much mabye a few. your throttle response will be better. i have a 4 and it is all that is needed
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5" is only beneficial over 4" when you exceed about 600HP. Until then, there isn't enough airflow to require the 5".
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5" just sounds better
Luke |
I would guess the 4" installs easier. Clearance was pretty tight in some spots on the downpipe with mine, I can't imagine how much more of a PITA it would have been if it was 5".
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I agree JBearSVT I just put a 4" diamond eye turbo back straight pipe on my truck yesterday and I couldn't imagine trying to get a 5" down pipe in that little bit of ro:tu:om. And my 4" sounds good enough for me!
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It sounds a lot better to me since I put the MBRP muffler on. I mean, it really doesn't sound any different in the cab, but outside it was just retarded.
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Yep I would have to agree the only difference is sound
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Originally Posted by JBearSVT
(Post 958309)
I would guess the 4" installs easier. Clearance was pretty tight in some spots on the downpipe with mine, I can't imagine how much more of a PITA it would have been if it was 5".
Originally Posted by dieselnut73
(Post 966598)
I agree JBearSVT I just put a 4" diamond eye turbo back straight pipe on my truck yesterday and I couldn't imagine trying to get a 5" down pipe in that little bit of ro:tu:om. And my 4" sounds good enough for me!
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Well that would certainly make it easier, there's plenty of room everywhere else.
On the other hand, it sounds like the downpipe would be a bottleneck in a 5" system. Then again, it's coming off a 3" flange from the turbo, so maybe that's a moot point. |
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