efr 8374 w/pettit ic core
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djseven (04-03-20)
#30
Rotary Motoring
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alexdimen
But isn't an s bend necessary to get under the subframe regardless of catback?
But isn't an s bend necessary to get under the subframe regardless of catback?
You can google image search for 1993 RX7 exhaust to see.
N1 style exhausts (loud) place the muffler at an angle to eliminate the bend just before the muffler.
Some large oval muffler systems (quiet) have a bend at the rear subframe, a straight section and then the bend just before the muffler. Flows much better than an "s" bend.
Some exhausts increase pipe diameter from 3" to 3.5" near the first bend at the subframe to reduce restriction further through the two bends.
Some others do have a tight "s" bend just before the muffler.
Racing beat has one extra bend the opposite of the "s" bend at the rear subframe to make room for the "s" bend interrupted by flanges. Flange mismatch is another point of possible restriction unique to the RB exhaust.
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