will a GSR header fit an LS?

 

it might be a lil shorter than the ls cuz the gsr cat is very long. obd1 ls header has an o2 hole but the gsr doesn't .

 

I believe the 00-01 gsr header is a direct fit

 

Depends on the year, a 94-99 GSR header will have no o2 bung, while the 00-01 does. Like Blacksage said, the 00-01 GSR should be about the same length, because the cat and exhaust are similar between the 2 models. If you have a 94-99 GSR header and a 94-95 LS cat, you will have no o2 bung at all, and you would some customizations to make the exhaust, header and cat fit together, and add a bung.

 

so it will bolt up to the head?

 

I am almost positive that ALL b series header will bolt up to the head w/o problems. The bottom part (I think it is called the A pipe) has all the problems

 

I thought so but wanted to make sure. THANK YOU GUYS!!!!!!