I have SLP 1 5/8 headers on my ZZ4 TPI. I am having continuing problems keeping fresh air out of the headers and screwing up the O2 sensor readings. First it was the copper Mr Gaskets leaking, then the old A.I.R. tube holes I had tapped and run bolts down. Now it's either the Dead Soft Aluminum header gaskets I put on or a slight mis-alignment of the driver side (also O2 side) y-pipe to header flange mount.
I am leaning towards the misalignment of the header flange now, especially since I installed the deadsoft gaskets. They really seemed to conform to the headers and all bolts are TIGHT!
Anyone else run into this problem?
Thanks

 

The ones that came with my SLP headers didn't last a month before they leaked all over the place. I replaced them with the reusable copper ones and not one problem in a year.

 

i have heard of a fw people having problems with the gskets that SLP supplies.

i just ordered my headers from them and used my own hardware, gaskets, etc.

i get the fel pro ones from autozone. they should have them in stock. they work great. i havent had a leak in 2 years.

-brian

 

Z28 Boy...what Part number Felpros did you use? IM wondering if the #1404 will work with the 1 3/4?

 

ill have to check...it was the stock ones for the car, they worked out ok. i checked the size of the opening compared to the header, and it didnt interupt the air flow.

-brian