Custom Exhaust

[Dragonmassa]

I'm trying to figure out what thickness tubing is the best make a custom exhaust on a 91 ST? Can anyone point me in the right direction?

[vi3ti3oi972]

----------------------------------------------------------Muffler Inlet/Outlet Size

Engine Size------------Horsepower---------Single Exhaust----------Dual Exhaust
150-200 CID------------100 to 150------------2" to 2-1/4"----------------2"
200-250 CID------------100 to 200------------2-1/4" to 2-1/2"------------ 2" to 2-1/4"
250-300CID------------150 to 250------------2-1/2" to 3" -----------------2" to 2-1/2"

[Dragonmassa]

Thanks

[garrisonboobs]

obx makes a catback for the st fyi. i think its on ebay.

[Old_El_Paseo]

isnt the stock exaust a 2 1/4 inch ? and engine puts out a little 125 hp...

[garrisonboobs]

Originally Posted by Old_El_Paseo

and engine puts out a little 125 hp...

not even. I think its like 110 and its an old engine so i'd assume its lost some hp to so i'm going with 100hp ahah

[Dragonmassa]

You are correct on the hp issue.

[garrisonboobs]

Originally Posted by Dragonmassa

You are correct on the hp issue.

which is why we must live up to the ST name and swap in a 4agzte!
ST=Super Turbo!

[Dragonmassa]

A friend of mine found a nice 4age cylinder head complete with cams and timing belt

[Dragonmassa]

would a catback for the gts fit on the ST