3100 headers

[thecircusb0y]

Yes, I tried the search function, and it wouldn't work , it just gives me a blank page. so quick down and dirty.
At Clubgp, ssheaders.com is listed for 3400 headers which will work with a 3100, do they bolt right up or do I need to modify anything before using them?
I'm planning out a new exhuast system for the car, to get done come spring.
Thank you very much for your help.

[Superdave]

2.8, 3.1. 3100, 3400 and 3500 all use the same bolt pattern. they'll bolt up fine

[thecircusb0y]

bless you sir, happy holidays.

now to plan out the rest of the exhuast system and what parts to get.

[PCGUY112887]

I thought the 3500 exhaust ports were offset a bit differently than the 3400's?

[bszopi]

What car are these going into? Just because they will bolt to the engine doesn't mean they will fit in the engine bay...

[bracketracer]

Header question

Yeah, I haven't heard of anyone being able to bolt these onto a 3.1 Gen II in a J-Body (and I can't tell what your application is based on your profile), so I am having a buddy who is a welder do a custom set for me. If they turn out well, he plans to be able to make additional sets. I'll keep everyone informed.

[blackbombshell95]

Its for a 94 Grand Prix

[Superdave]

I thought the 3500 exhaust ports were offset a bit differently than the 3400's?

The ports are slightly different, but the mounting is the same. the 3400 gaskets fit the 3500 ports almost perfect. No overlap.

i have a set in the garage right now with 3400 gaskets and 3400 D port flanges bolted to them.

Yeah, I haven't heard of anyone being able to bolt these onto a 3.1 Gen II in a J-Body (and I can't tell what your application is based on your profile), so I am having a buddy who is a welder do a custom set for me. If they turn out well, he plans to be able to make additional sets. I'll keep everyone informed.

Yah, his won't fit into a Jbody w/o mods. Usually the front one fits fine, it's the rear one that causes problems. It's usually easier just to make your own (as i have going on 3 times now) for the J's.

[thecircusb0y]

Blackbombshell is correct, I have a 94 Grand Prix.

does anybody know off the top of their head what the performance headers will cost?

[canuck_corsica95]

what headers would fit a 95 Corsica with 3.1 - search brought up nothing

[loner666]

what headers would fit a 95 Corsica with 3.1 - search brought up nothing

im 99% positive that ull have to custom make some as no one makes any yet...........or id have some by now

[JMo60]

I put S&S headers for a grand am on my 94 grand prix.. it was a little tight, but it fits without modifications at all...

[canuck_corsica95]

custom headers..... this is going to be a real PITA - everything under the hood of the Corsica is tight!

[Superdave]

custom headers..... this is going to be a real PITA - everything under the hood of the Corsica is tight!

Same thing for a Cavalier, i've done it twice.. starting a 3rd set now

[canuck_corsica95]

want to build me a set? i have terrible welds