SLP4CamaroSS

iTrader: (16)

making a custome ypipe and exhaust what inch piping should i go?

HeapaShifter

iTrader: (2)

3 inch unless you're making big horsepower.

orangeapeel

iTrader: (18)

Anything bigger and you will almost be losing power due to the negatives such as less scavenging.

SLP4CamaroSS

iTrader: (16)

cuz they said a 3inch y pipe flows as well as a 2.5 x pipe so a 3.5in y pipe and exhuast would be ok and flow as well as a 3in xpipie

SLP4CamaroSS

iTrader: (16)

or even a 3.5 or 4 y pipe and reduce to a 3inch

Ferocity02

iTrader: (60)

3" Y-pipe is more than enough for stock cubes.

SLP4CamaroSS

iTrader: (16)

found this in the sticky
A 2.75” (stock) single system is good for a 310hp engine with zero loss…
A 3” Single system is good for a 370hp engine with zero loss…
A 3.5” Single system is good for a 503hp engine with zero loss…
A 4” Single system is good for a 657hp engine with zero loss…
A 2.25” dual system is good for a 457hp engine with zero loss…
A 2.5” dual system is good for a 513hp engine with zero loss…
A 3” dual system is good for a 812hp engine with zero loss…

Viper

iTrader: (6)

2.5" y-pipe to a 3.5" i-pipe and catback here. Plenty of flow.

02RedHawk

iTrader: (17)

2.5" Y-pipe to a stock 3" i-pipe/catback, plenty of flow here, too. (see sig)

Ferocity02

iTrader: (60)

But with what design pipe, how long, how many bends, etc... A 3" pipe would support 1000hp if it was straight and only 6" long.