Generation III External Engine LS1 | LS6 | Bolt-Ons | Intakes | Exhaust | Ignition | Accessories
Sponsored by:
Sponsored by:

Can the FLP header collector be bent?

Thread Tools
 
Search this Thread
 
Old Jul 12, 2002 | 03:22 AM
  #1  
PewterZ28's Avatar
Thread Starter
10 Second Club
iTrader: (1)
 
Joined: Mar 2002
Posts: 1,088
Likes: 0
From: St.Louis, MO
Default Can the FLP header collector be bent?

The angle of the header collector on the driver side is pointed upwards so much that I can't even put the cat on! I used a '99 set off my old Z but I was told by Mitch that it would fit. The fitment was pretty bad on my '99 but on my '02 it's so bad that it's humorous...not really though. <img border="0" title="" alt="[Roll Eyes]" src="images/icons/rolleyes.gif" />
Right now, I'm using a bent off-road pipe, otherwise I'd be SOL. And forget pounding on the floor board, I would have to cut 4 or 5 inches to make the pipes clear! <img border="0" alt="[guns]" title="" src="graemlins/gr_guns.gif" />
So, is there anyway to bend the header so that the collector is level with the ground, instead of pointing up? I've tried exhaust shops and they've all said no. Any ideas?

Derrick
Reply
Old Jul 12, 2002 | 03:47 AM
  #2  
DaddySS's Avatar
TECH Addict
 
Joined: Dec 2001
Posts: 2,907
Likes: 1
From: Bergen County, NJ
Default Re: Can the FLP header collector be bent?

Dumb question: have you loosened the header bolts?

It seems odd that the angle of headers would change.
Reply
Old Jul 12, 2002 | 11:29 AM
  #3  
PewterZ28's Avatar
Thread Starter
10 Second Club
iTrader: (1)
 
Joined: Mar 2002
Posts: 1,088
Likes: 0
From: St.Louis, MO
Default Re: Can the FLP header collector be bent?

Not sure I understand what you mean. The header bolts were tightened to 24 ft/lbs.
My old car was a '99 6 speed and the motor mounts were worn, making the engine sit lower. At least the passenger side #6 primary doesn't hit the frame like it did on my old car.
On my new car the engine sits a little higher, causing the driver side clearance to be even worse. Still, even if the engine were sitting lower, the angle of the collector points way too high.
Reply
Old Jul 12, 2002 | 10:01 PM
  #4  
Nickn20's Avatar
9 Second Club
 
Joined: Nov 2001
Posts: 1,445
Likes: 0
From: Bay Area, CA
Default Re: Can the FLP header collector be bent?

to answer your question yes, clamp on the offroad pipe and find a way to pry it downward, I had to do this on my car, it takes some force too!
Reply
Old Jul 13, 2002 | 12:47 AM
  #5  
DaddySS's Avatar
TECH Addict
 
Joined: Dec 2001
Posts: 2,907
Likes: 1
From: Bergen County, NJ
Default Re: Can the FLP header collector be bent?

Normally when you're setting these things up, you hand tighten , get everything aligned, then fully tighten. So my question was wouldn't it be better to loosen the header bolts and see what you've got in the way of adjustment?
Reply
Old Jul 16, 2002 | 12:13 AM
  #6  
PewterZ28's Avatar
Thread Starter
10 Second Club
iTrader: (1)
 
Joined: Mar 2002
Posts: 1,088
Likes: 0
From: St.Louis, MO
Default Re: Can the FLP header collector be bent?

DaddySS, that wouldn't help...unless the collector is suddenly going to move approximately 25 degrees.

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Nickn20:
<strong>to answer your question yes, clamp on the offroad pipe and find a way to pry it downward, I had to do this on my car, it takes some force too!</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">OK, but what gave way and bent? The header collector or the off-road pipe?
It seems like the header bolts would bend, or maybe even the big C clamp would bend, before the big *** header collector bent.

Derrick
Reply
Old Jul 17, 2002 | 02:04 AM
  #7  
PewterZ28's Avatar
Thread Starter
10 Second Club
iTrader: (1)
 
Joined: Mar 2002
Posts: 1,088
Likes: 0
From: St.Louis, MO
Default Re: Can the FLP header collector be bent?

ttt
Reply
Old Jul 17, 2002 | 03:29 AM
  #8  
DaddySS's Avatar
TECH Addict
 
Joined: Dec 2001
Posts: 2,907
Likes: 1
From: Bergen County, NJ
Default Re: Can the FLP header collector be bent?

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by PewterZ28:
<strong>DaddySS, that wouldn't help...unless the collector is suddenly going to move approximately 25 degrees.

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Nickn20:
<strong>to answer your question yes, clamp on the offroad pipe and find a way to pry it downward, I had to do this on my car, it takes some force too!</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">OK, but what gave way and bent? The header collector or the off-road pipe?
It seems like the header bolts would bend, or maybe even the big C clamp would bend, before the big *** header collector bent.

Derrick</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">But doesn't that imply that this current engine setup is 25 degrees different than the previous engine position? Something doesn't sound right unless the collector and lower pipe assembly got bent up? I think if you take i to a muffler shop they can heat it and bend it but they'll need to be careful not to kink it.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Jul 17, 2002 | 04:10 AM
  #9  
Nickn20's Avatar
9 Second Club
 
Joined: Nov 2001
Posts: 1,445
Likes: 0
From: Bay Area, CA
Default Re: Can the FLP header collector be bent?

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by PewterZ28:
<strong>DaddySS, that wouldn't help...unless the collector is suddenly going to move approximately 25 degrees.

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Nickn20:
<strong>to answer your question yes, clamp on the offroad pipe and find a way to pry it downward, I had to do this on my car, it takes some force too!</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">OK, but what gave way and bent? The header collector or the off-road pipe?
It seems like the header bolts would bend, or maybe even the big C clamp would bend, before the big *** header collector bent.

Derrick</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">the collector flange would be my guess, I got these instructions straight from dan at FLP about a year ago.
Reply
Old Jul 17, 2002 | 08:01 AM
  #10  
Bad02WS6's Avatar
TECH Resident
 
Joined: Mar 2002
Posts: 770
Likes: 0
From: WA
Default Re: Can the FLP header collector be bent?

Check your motor mounts.
I don't think you could bend the collector without damaging it.

Here's an idea. Weld in a insert piece to re-angle the flange. Cut the collector near the flange. Cut a small ring out of a mandrel bent turn pipe. Cut it from the middle of the turn. The insert piece would be something like .5 inches on the inside curve, and 1 inch on outside curve. Just enough angle on the insert piece to get the flange pointing strait back. Weld the small slice of turn pipe in between the collector and flange. Then cut a small loop out of the Y-pipe to compensate for the extra length of the collector. Your flange would be angled right, but will still be higher to the floorboard. If the collector is to close to the floorboard. You might try making a mini S turn. One insert piece to angle the collector slightly down. One piece to correct the angle for the flange.

Don't cut pieces from the collector to re-angle the flange. If you ever want to sell the headers later. It will be easier to cut the inserts out, and re-weld the flange into the original position. If you cut pieces out of the collector. It will be a lot harder to reverse the process. If you try to bend the collector, and kink it. Then you’re screwed.

Good luck. I would have posted the idea sooner, but I just thought of it. Hope this helps.
Reply
Old Jul 18, 2002 | 12:47 AM
  #11  
PewterZ28's Avatar
Thread Starter
10 Second Club
iTrader: (1)
 
Joined: Mar 2002
Posts: 1,088
Likes: 0
From: St.Louis, MO
Default Re: Can the FLP header collector be bent?

Brad, That's a good idea, one that would work but one that is also a pain in the *** for $1200 headers that should have fit perfectly. I thought of something similar to that but I really would rather not do that. If it comes to that, I just might though. Thank you.

Nick, I'm going to give Dan or Mitch at FLP a call. They were cool in the past but last time I talked to them, I was under the impression that they have changed a little. Hopefully I'm wrong.

I'll let you know how it goes.
Derrick
Reply
Old Jul 18, 2002 | 08:05 AM
  #12  
Bad02WS6's Avatar
TECH Resident
 
Joined: Mar 2002
Posts: 770
Likes: 0
From: WA
Default Re: Can the FLP header collector be bent?

If your talkin bought my idea. The name is Steve.
Hope you get it worked out. <img border="0" title="" alt="[Cool]" src="gr_images/icons/cool.gif" /> <img border="0" alt="[Burnout]" title="" src="graemlins/burnout.gif" />
Reply
Old Jul 18, 2002 | 04:49 PM
  #13  
PewterZ28's Avatar
Thread Starter
10 Second Club
iTrader: (1)
 
Joined: Mar 2002
Posts: 1,088
Likes: 0
From: St.Louis, MO
Default Re: Can the FLP header collector be bent?

Oops! Sorry, I misread your username as Brad02WS6. <img border="0" title="" alt="[Embarrassed]" src="gr_emb.gif" />

Derrick <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
Reply
Old Jul 18, 2002 | 07:02 PM
  #14  
Sears's Avatar
!Dial-up Director
 
Joined: Nov 2001
Posts: 3,100
Likes: 1
From: Louisiana
Default Re: Can the FLP header collector be bent?

OK, maybe I am mis-understanding this but here I go..

FLP revised the design of their y-pipe at some point. The original version had no angles cut into the y-ipe/off road pipes. The new version, they cut and welded the flanges of the y-pipe and off road pipe to angle down away from the floorboard.

This angle was designed to lower the pipe to allow for more floorboard clearance and solve the infamous banging problem.

The rear drivers side of the y-pipe needs to have the flange at an angle for it to accept the off road pipe at the right angle and all to fit right. So you need to angle the y-pipe not the header flange.

Justin
Reply
Old Jul 19, 2002 | 12:33 AM
  #15  
PewterZ28's Avatar
Thread Starter
10 Second Club
iTrader: (1)
 
Joined: Mar 2002
Posts: 1,088
Likes: 0
From: St.Louis, MO
Default Re: Can the FLP header collector be bent?

Yeah, you're misunderstanding. Mitch asked me to send him a picture. I'll post it here too.

Basically, when you clamp the catalytic converter onto the header collector, the rear side of the cat is up against the floor board.

I should have a pic posted soon.

Derrick
Reply
Old Jul 19, 2002 | 12:44 AM
  #16  
PewterZ28's Avatar
Thread Starter
10 Second Club
iTrader: (1)
 
Joined: Mar 2002
Posts: 1,088
Likes: 0
From: St.Louis, MO
Default Re: Can the FLP header collector be bent?

I just re-read your post and I understand what you are saying. That would work also. I would have to bend the cat twice...or cut out a very small triangle on both sides, then reweld the flanges back on.
The angle of the header collector flange causes the cat (or off-road pipe) to point to the floor. The first bend would aim the cat back down so that it does not hit the floor board, the second bend would straighten out so that the y-pipe could connect and be level with the ground rather than hang too low. Of course, the easiest thing would be to have a header whose collector flange connects to the cat and aims it parallel with the ground and with 1.5 inches of clearance at the floor board. <img border="0" title="" alt="[Roll Eyes]" src="images/icons/rolleyes.gif" />
I'll stop there before I start confusing myself. <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />

Derrick
Reply




All times are GMT -5. The time now is 05:42 AM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE