Iron Fist

will the smaller diameter of the bbk y majorly limit the car from a performance standpoint?

Jay-P

iTrader: (16)

Depends on your mods really. H/c car might suffer a bit. But i really doubt a stock car would see much of a difference.

Latch

iTrader: (8)

Considering most catbacks are single 3" pipes that split into dual 2.5" exits then I doubt a 2.5" Y-pipe is going to flow any worse than the rest of the exhaust.

Jay-P

iTrader: (16)

Theory is that the further down stream the restriction in exhaust flow is, the less effect it will have. So a 2 2.5" exits really are no restriction at all.

On to the question at hand, i was thinking, id imagine that most of the terrible y-merges on the various 3" y-pipes would probably hinder exhaust flow more then 2.5" pipes with the better flowing merge on the bbk y-pipe.

99Bluz28

iTrader: (35)

I don't see it holding you back on power with a stock cu.in. N.A. motor, in most situations, unless you plan on spinning the motor up to really high RPM's.

MikeWS6

Isnt the stock Y pipe 2.5 inches?

94Z28-MSTGKLR

iTrader: (20)

Why are people so concerned with a 2.5" y pipe when they still run a damn 3" catback? I don't get it. Dual 2.5" will out flow a single 3". I went from a 3" catback to duals that were reduced to 2.5" at the header and kept that diameter all the way back. I picked up a nice difference that I had been leaving on the table with the single 3". Unless youre making crazy horsepower it won't hurt anything.

Iron Fist

okay, thanks for answering my question. I just wanted to make sure I wouldn't be leaving 20+ hp on the table on my bolt-on car..

94Z28-MSTGKLR

iTrader: (20)

No man your good, don't sweat it. If you were running a supercharged 427 or something I'd look elsewhere, but no, your good.