Boyscout

iTrader: (3)

I have a 91 Celsior (LS400) and bought the S&S headers. the 3-bolt flange on the headers is the wrong size and the tube lip on the cat is a bigger diameter than the header exit, so it wont go together.


My options are:


1) put in de-cat pipes
2) get some flanges made & put in some universal high flow cats


either way, i need to know this info:

the measurement from flange to flange? (length)

the diameter if the tube lip on the 3-bolt flange side?

Also, it would be a great help if someone could trace the flanges and bolt holes onto a piece of paper and email it to me (or post it here). you will need to draw a 1" reference line on the paper so i make sure it is printed the right size. that way i know for sure it will fit.


I would greatly appreciate the help.

thanks

illcelsior

If it were me, I'd skip the cats and flange business and put a high flow cat mid pipe.

PureDrifter

iTrader: (10)

u need to get a pair of high flow cats and have them custom flanged to fit. the location also has to be slightly changed on 1LS iirc.

Boyscout

iTrader: (3)

since i will be supercharging it, i think de-cat is way to go.