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hey guys looking for a catback either 3 or 3.5" for my 33. been reading through some search results and besides db rating and "personal oponions" cant seem to find any specs on cfm/flow rating or systems that are true 3".

looking at reinhard 001, blitz nur, trust pe2, hks silent high power and apexi n1.

any/all info on these or back to back testing/ comparisons would be great.

cheers patrick

If you've got a stock turbo, anything that is true 3" will be fine.

They will all flow near enough to the same for the sake of the discussion as 3" piping and straight through mufflers are only ever going to flow a certain amount when not under pressure, so no-one will have tested it and I've never see any such results anywhere.

Where the dB factor comes in is how well the mufflers are made and associated with that is weight in most cases.

much wiser to spend the money on the turbo rather than fancy brand name exhausts,

my system is a 3 1/2inch jap system from the wreckers , cost $180 i changed the fujitsubo muffler for a 3inch Xforce oval muffler,

320kw flow with acceptable noise levels and minimal $$$ spent on exhaust = wise choice

Edited by SliverS2

haha yeah my $100 rusty special 3.5" exhaust was fine for 365rwkw, changed to a more expensive 3.5" - no change... Although the headache would've been eliminated as the drone was waaaay excessive with the el-cheapo single muffler (if you could call it that) setup. :)

Silent 3" system flowed 360kw on my car... Was a little laggier than I hoped but was an awesome result for what it is... It's an Apexi I think, the one with the ironic "Super Megaphone" on it :)

Whilst I currently have an Evo, not a Line, I can share my experience as principle is the same.

Went from a True 3'inch custom made cat back (loud and droney) to a 3 inch Fujitsubo RMO1A which tapers to 2.5 inch inside the 2 resonators.

Notice sweet F$%k all in terms of power difference. All i felt was a bees dick more lag, and about 99% less headaches with the RMO1A :-)

Also have had a HKS Hi Power and 5Zigen pro racer on the Evo and exactly the same. Not much difference between all of them...

Better off getting a decent tune.

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