3ttamsivla

i'm looking to and a cut out where my cat was until I can afford a whole new exhaust. anyone know the diameter of the exhaust before and after the Cat?

riceburnerZ28

iTrader: (20)

It should be 2.75”

3ttamsivla

okay thank you

MasterTomos

iTrader: (15)

as far as welding in a cutout, anything from 2.5inches-3 inches will fit in just fine. I have a 3" muffler and a 3" cutout in my I-pipe, which I believe is 2.75 inches before the muffler, 2.5 after the muffler(tailpipes)

transamws6_97

iTrader: (5)

unless the stock lt1 exhaust is different than the ws6...mine was 2.75 post cat also..i would go with 3" cutout but an easy way to measure your exhaust if you dont have calipers is take a piece of string and wrap it around your exhaust and mark where it overlaps...then just do some simple math and you can figure out the diameter

RamAir95TA

iTrader: (2)

Mine was also 2.75".

shbox

2.75" stock after cat on mine, too.

Rob

iTrader: (6)

WS6 got the same exhaust as any other LT1 Formula or Trans Am. Only the tips were different.

MasterTomos

iTrader: (15)

I'm not positive if it was the Firehawks only, or the ws6's as well, but I believe a 3" catback was offered on some SLP Firebirds like they were on the Camaro SS's as an option SLP dual/dual setup IIRC

Rob

iTrader: (6)

Only the Firehawk and SS could get the optional 2OTL or dual/dual(97). SLP WS6's only came with the stock exhaust.