thorley headers

[1971gmcshortbed]

Hart_Rod, did you add the O2 bung or do they come equipped?

[Hart_Rod]

Originally Posted by 68GMCCustom

I really like these headers and how tight they are to the frame, I just wish these were available with larger primaries. 1 5/8" might be ok for the smaller LS1's or even the LS2's with the cathedral port heads...but the 6.0's and 6.2's with the large rectangular port/larger valve heads need a little more...like 1 7/8" or at least 1 3/4", with a 3" collector.

I would call them...

Originally Posted by 1971gmcshortbed

Thats what I was thinking 68GMCustom, I'll be running a 6.2 and I want it to flow. I wanted to run dual 3" out to the rt side front rear tire. I'm wondering if it will be counterproductive to run the dual 3's if I'll be choking down at the primaries and collector. Love the Thorleys though.

I would call and ask. I bet you're not the only person that would like a 3" setup....

Originally Posted by 1971gmcshortbed

Hart_Rod, did you add the O2 bung or do they come equipped?

It's already there.

[1971gmcshortbed]

I called Brent at bnr performance today he said they will build a set with 1 3/4 primaries for $650.... Hmmmmm...

[Hart_Rod]

Originally Posted by 1971gmcshortbed

I called Brent at bnr performance today he said they will build a set with 1 3/4 primaries for $650.... Hmmmmm...

Did you ask about a group buy? I'm sure more folks would jump in on that...

[1971gmcshortbed]

I didn't ask Rob, he said one of the guys at Thorley builds them on the side. That may not be a bad idea. It looks like this swap is very popular, they recently made a batch of 25 and they are all gone. Brent said he has another 25 people waiting also.

[68GMCCustom]

1972gmc if you go with the 1 3/4" set...put me in line with you...especially if we can get that price knocked down just a bit since there will be more then one. $575-$600 sounds more reasonable for a "semi-custom" set.