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Full si coupe exhaust system on r18 sedan

tsumaku

Well-Known Member
54
18
Texas
Vehicle Model
Civic EX-L
Body Style
Sedan
Does anyone know if the full coupe si exhaust fit the r18 sedan.

Thanks!
 

tsumaku

Well-Known Member
54
18
Texas
Vehicle Model
Civic EX-L
Body Style
Sedan
i have the si rear bumper though, is that what youre referring too?
 

tsumaku

Well-Known Member
54
18
Texas
Vehicle Model
Civic EX-L
Body Style
Sedan
the si coupe full exhaust no header on a sedan r18 with si rear bumper
 

FB2Chris

Well-Known Member
2,804
1,627
The rear bumper has nothing to do with it, a Si axle back can clear the non-Si bumper no problem. It's the downpipe. The beginning of the R18 mid-pipe is sloped in order to connect to the downpipe, where as the Si mid-pipe is straight.
 

FB2Chris

Well-Known Member
2,804
1,627
R18:


Si:
 

hey_mikey

Well-Known Member
1,054
894
Concord, NC
Vehicle Model
Accord Sport
Body Style
Sedan
the k24's exhaust port is on the rear side of the head while the r18 has its exhaust port on the front. as shown in the diagrams above, the downpipe (or header or whatever you wanna call it) of each motor connects to the midpipe at different points, behind the block on the k24 and in front of the block on the r18. long story short, the two are not interchangeable.
 
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