exhaust question

raf

raf

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Location
Saint Louis, Missouri
Vehicle Model
honda civic si
Body Style
sedan
so im pretty low and ive scraped my exhaust so much that it has so many leaks and sounds ricy (70mm tsudo catback) i have a hf full race dp and a k&n sri and i wanted to put my stock exhaust back on what do u have think? like would i loose alot of power? would my engine struggle at all cuz the stock piping is small just state youre opinion pleaseeeeee thanks because i really dont feel like spending $600+ on pipes anymore lol
 
If you are concerned about power, raise your car a bit. Otherwise, you will lose about 10-15hp going back to stock exhaust. A retune will take care of any issues.
 
HP claims tend to be stated based on a strict bolt-on without a tune, so yes. Also, if you have a DP, you really should have a tune. You are doing your engine (and money invested) a disservice otherwise.
 
Yes. Dropping from a 70mm to a 60mm is a pretty significant percentage decrease in cross sectional area.

70mm: 3846.5mm^2

60mm: 2826mm^2

That's a X-sectional area decrease of 26% (1020.5mm^2/3846.5mm^2).

Also, I'm not sure if the stock exhaust can be bolted to a 3" DP.
 
If you scraped holes in the tsudo, you'll eventually scrape holes in the stock exhaust if you put it back on and you'll just continue that cycle with new exhausts... So I would take squiggy's advice and just raise the car a little
 
ok thanks alot guys! knew i could get some help here lol
 
Definitely get a tune if you have a DP.....huge difference from what I am told. I am getting both ordered for mine in roughly a week or so
 
got about 3 tickets on my name:/ soon as i take care of those fp on its way :)) and good luck hope it works out for u
Dennis Rockholt said:
Definitely get a tune if you have a DP.....huge difference from what I am told. I am getting both ordered for mine in roughly a week or so
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