these are the pipes that got the car thru in Vic last year, they were tested at daddler exhaust in dandenong, they came in at 82dba. way to quiet. 1-5/8" primery ceramic headers, to a 4" collector (by the way, i cant find a better way to run them into each other) with internal cats, and resenators, to a few tight sh1tty bends, commodore muffler and 2 x hot dogs. ther you have it, car was engineered by inkelmans in moorabbin by collin young. they passed fine.
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this was the parts for the internals
show pipes with no internals
thes are the show pipes with internals and gaurds