This is a discussion on dynatech headers within the External Engine forums, part of the LSx Technical Help Section category; 1 3/4" to 1 7/8" stepped headers. when i ordered them, i didn't read where it said does not come ...
02-14-2007, 07:59 PM #1
1 3/4" to 1 7/8" stepped headers. when i ordered them, i didn't read where it said does not come with collectors. i knew 525.00 was too good of a price. the 3" collectors for them are 125.00 for standard collectors ( i ordered these ), or you can get their special merge collectors ( more power ) for 325.00. not for me.
02-15-2007, 05:33 AM #2
Look good, aren't they stainless too?
I got a dumb question, what exactly is the advantage/reason for stepped headers?
02-15-2007, 08:28 AM #3
mild steel ceramic coated.
it's to help keep as much overall power as possible throughout the entire rpm range. just like a cam, the larger the tube, the higher the rpm band it makes power with the sacrifice of low/mid power. so, with it starting off with 1 3/4" tube, then expanding to 1 7/8" it helps to maintain the low/mid rpms and give you better upper rpms.
02-15-2007, 09:54 AM #4
Awhile ago, GMHTP did a full-exhaust setup on an LS1 TA with those headers, y-pipe, and borla catback. They saw pretty good gains too. I could of sworn that they were stainless. But the design looks so much different from all the other longtubes.
02-15-2007, 10:17 AM #5
you can get them in stainless as well.
02-22-2007, 05:04 PM #6
02-22-2007, 06:30 PM #7
Nice install. Haven't looked at an LS1 in person for awhile, but it looks like the LS1 is a tighter fit all the way around than the LT1. And the steering knuckle came really close too. Good job though.
02-23-2007, 05:31 AM #8
Nice install! You didn't mention it so I will ask anyway.
Did you have to jack either side of the engine up?
:What did you use to dent the firewall to install the driverside header?
I purchased a set of QTP headers and I just wanted some insight as to some stuff I might run into. I do know they are different, so I might run into different problems!
Last edited by 9t8z28; 02-23-2007 at 05:36 AM.
02-23-2007, 05:32 AM #9
02-23-2007, 08:28 AM #10
Must have been camera angles then. But yeah, the header install on my 94 wasn't fun, wasn't too bad, but wasn't fun.
02-23-2007, 08:54 AM #11
02-26-2007, 04:11 PM #12
at the bottom is pics of the fitment issues and what it took to resolve them.
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