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

FLP vs SLP LT

Thread Tools
 
Search this Thread
 
Old Sep 25, 2002 | 10:06 PM
  #1  
Roarin_8's Avatar
Thread Starter
12 Second Club
20 Year Member
Photogenic
Liked
Loved
iTrader: (6)
 
Joined: Aug 2002
Posts: 4,578
Likes: 49
From: Kissimmee, FL
Default FLP vs SLP LT

Anyone here have the pros and cons of both the SLP and FLP longtube headers mated with an SLP loudmouth? Which one is louder? I know that the SLP's hang lower. Which one is more reliable? Anyone?
Reply
Old Sep 25, 2002 | 10:13 PM
  #2  
mitchntx's Avatar
TECH Senior Member
20 Year Member
iTrader: (14)
 
Joined: Nov 2001
Posts: 6,480
Likes: 2
From: DFW, Texas
Default Re: FLP vs SLP LT

While attempting to button up my FLPs this evening, I couldn't get the AIR tube on the driver's side to align.

It was out by 90*.

So I had to heat and bend my existing AIR tube to get it to fit. What bullshit for $1400 ...
Reply
Old Sep 25, 2002 | 11:14 PM
  #3  
Slowhawk's Avatar
LS1Tech Sponsor
iTrader: (12)
 
Joined: Nov 2001
Posts: 14,865
Likes: 6
From: Bridgewater,Ma
Default Re: FLP vs SLP LT

They will both sound the same(very loud)Quality is good on both.FLP's are easier to install and fit tighter to the floor.
As for the problem above,sorry to hear of your problems,the place you got them from sent you the wrong ones!!There are 2 styles.Mine fit fine
Reply
Old Sep 25, 2002 | 11:24 PM
  #4  
Roarin_8's Avatar
Thread Starter
12 Second Club
20 Year Member
Photogenic
Liked
Loved
iTrader: (6)
 
Joined: Aug 2002
Posts: 4,578
Likes: 49
From: Kissimmee, FL
Default Re: FLP vs SLP LT

Hey Slowhawk, how are you doing? You sent me the photos of your FLP install. Crazy install with the jacks!! Do you have to put O2 sensors on if you are running the high flow cats?
Reply
Old Sep 25, 2002 | 11:57 PM
  #5  
CRAGER's Avatar
Administrator
20 Year Member
Photogenic
Photoriffic
 
Joined: Nov 2001
Posts: 29,404
Likes: 0
From: Houston, TX
Default Re: FLP vs SLP LT

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by mitchntx:
<strong>While attempting to button up my FLPs this evening, I couldn't get the AIR tube on the driver's side to align.

It was out by 90*.

So I had to heat and bend my existing AIR tube to get it to fit. What bullshit for $1400 ...</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Are you talking about the year model air tubes? Because when I bought my FLP's they were made for 98-99's (mine is an 01'), and the air tubes are at different angles. When MTI installed mine they put on those 98-99' air tubes to fit. My friend with a 00' just bent his to fit.

Peace,
Craig.
Reply
Old Sep 26, 2002 | 12:02 AM
  #6  
CRAGER's Avatar
Administrator
20 Year Member
Photogenic
Photoriffic
 
Joined: Nov 2001
Posts: 29,404
Likes: 0
From: Houston, TX
Default Re: FLP vs SLP LT

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Roarin_8:
<strong>Anyone here have the pros and cons of both the SLP and FLP longtube headers mated with an SLP loudmouth? Which one is louder? I know that the SLP's hang lower. Which one is more reliable? Anyone?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I just swapped out Borla for the Loudmouth. The angle was a bit off. When the muffler shop was putting it on they had to cut a piece off the loudmouth to fit it, otherwise it fits fine.

I've heard that the FLP's are the easiest LT's to put on. I think it depends on what you want. If you want to be able to take your cats on or off then go with the FLP's. Just my $.02

Peace,
Craig.
Reply
Old Sep 26, 2002 | 07:12 AM
  #7  
BillWS6Formula's Avatar
TECH Apprentice
 
Joined: Mar 2002
Posts: 357
Likes: 0
From: Newfoundland, Canada
Default Re: FLP vs SLP LT

My recent FLP experience below...I'm happy with mine! <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

https://ls1tech.com/ubb/cgi-bin/ulti...;f=24;t=003489
Reply
Old Sep 26, 2002 | 08:35 AM
  #8  
LOnSLO's Avatar
TECH Addict
iTrader: (15)
 
Joined: Sep 2002
Posts: 2,537
Likes: 1
From: Gainesville, GA
Default Re: FLP vs SLP LT

I'm totally satisfied with my SLP lt's. Only down side is how low they hang, but I have NO y-pipe banging issues, and the quality is top notch. Gained a solid .4 in the quarter, and 4 mph. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
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 Sep 26, 2002 | 09:06 AM
  #9  
Slowhawk's Avatar
LS1Tech Sponsor
iTrader: (12)
 
Joined: Nov 2001
Posts: 14,865
Likes: 6
From: Bridgewater,Ma
Default Re: FLP vs SLP LT

I ordered 01 FLP's and the air tubes were correct(no modifications needed)

02 sensors-I run the front 2 and the back gets 02 simms.
Reply
Old Sep 26, 2002 | 09:23 AM
  #10  
Roarin_8's Avatar
Thread Starter
12 Second Club
20 Year Member
Photogenic
Liked
Loved
iTrader: (6)
 
Joined: Aug 2002
Posts: 4,578
Likes: 49
From: Kissimmee, FL
Default Re: FLP vs SLP LT

Slowhawk- are you still running offroad pipes or cats?
Reply
Old Sep 26, 2002 | 10:32 AM
  #11  
Jasc's Avatar
On The Tree
 
Joined: Mar 2002
Posts: 175
Likes: 0
From: League City TX
Default Re: FLP vs SLP LT

Like my FLPs, floor banging problem easy fix.

Crager, why loudmouth over borla? I went the other way.... Corsa over Loudmouth.

Steve
Reply
Old Sep 26, 2002 | 10:51 AM
  #12  
Slowhawk's Avatar
LS1Tech Sponsor
iTrader: (12)
 
Joined: Nov 2001
Posts: 14,865
Likes: 6
From: Bridgewater,Ma
Default Re: FLP vs SLP LT

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Roarin_8:
<strong>Slowhawk- are you still running offroad pipes or cats?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Matter's what day it is <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> I ran Cats most of the summer,but now offroads for my track outings.Only takes me 10 minutes to switch them out now.
Reply
Old Sep 26, 2002 | 01:02 PM
  #13  
Jasc's Avatar
On The Tree
 
Joined: Mar 2002
Posts: 175
Likes: 0
From: League City TX
Default Re: FLP vs SLP LT

Craig, sent you a PM.

Steve
Reply
Old Sep 26, 2002 | 01:55 PM
  #14  
buschman's Avatar
TECH Fanatic
 
Joined: Dec 2001
Posts: 1,220
Likes: 0
From: Germantown, MD
Default Re: FLP vs SLP LT

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Roarin_8:
<strong> Crazy install with the jacks!! Do you have to put O2 sensors on if you are running the high flow cats?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I did an FLP install for a , ahem... friend. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> Did it on jackstands, and while it might not have been the most comfortable position to be in for several hours, the install wasn't bad at all. The FLPs are the best quality headers I have ever seen. The price is kinda step, but when you compare what you get (headers, install kit, cats, offroad pipes, and y-pipe) it's actually a very good deal. All that stuff would cost you more than 1300-1400 dollars from other manufactorers.

We also had the 90* problem but we purposely bought 01/02 headers for the 00 cause we wanted to eliminate the EGR provisions. It only took a bench vise and a little elbow grease to fix the problem. No biggy.

Great headers!

Mike
Reply
Old Sep 26, 2002 | 10:54 PM
  #15  
Roarin_8's Avatar
Thread Starter
12 Second Club
20 Year Member
Photogenic
Liked
Loved
iTrader: (6)
 
Joined: Aug 2002
Posts: 4,578
Likes: 49
From: Kissimmee, FL
Default Re: FLP vs SLP LT

Hey guys, thanks for all the responses. Why would you want to take off the EGR provisions on the car? What are the benefits from that?
Reply
Old Sep 27, 2002 | 12:18 AM
  #16  
CRAGER's Avatar
Administrator
20 Year Member
Photogenic
Photoriffic
 
Joined: Nov 2001
Posts: 29,404
Likes: 0
From: Houston, TX
Default Re: FLP vs SLP LT

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Jasc:
<strong>Crager, why loudmouth over borla? I went the other way.... Corsa over Loudmouth.

Steve</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I was getting tired of the Borla and its rasp, plus it's pretty heavy.

I'm re-doing the y-pipe back. MTI is building me a custom 3" y-pipe, after that on the i-pipe I'll have a 3-1/2" cut-out with a QTEC electric gate, and after the cut-out is a 3-1/2" Borla XR-1 in place of the Loudmouth resonator.

Peace,
Craig.
Reply
Old Sep 27, 2002 | 12:34 AM
  #17  
Jasc's Avatar
On The Tree
 
Joined: Mar 2002
Posts: 175
Likes: 0
From: League City TX
Default Re: FLP vs SLP LT

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif"> I'm re-doing the y-pipe back. MTI is building me a custom 3" y-pipe, after that on the i-pipe I'll have a 3-1/2" cut-out with a QTEC electric gate, and after the cut-out is a 3-1/2" Borla XR-1 in place of the Loudmouth resonator.

Peace,
Craig.
</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Sounds cool Craig. Would like to hear it when ya get done.

Steve
Reply
Old Sep 27, 2002 | 12:53 AM
  #18  
rnr27band1's Avatar
TECH Resident
 
Joined: Mar 2002
Posts: 776
Likes: 0
From: Augusta GA, Atlanta GA (school)
Default Re: FLP vs SLP LT

i would get flps or grotts if i were gonna step up to long tubes, but i got macs and i like them alot.
Reply
Old Sep 27, 2002 | 12:54 AM
  #19  
CRAGER's Avatar
Administrator
20 Year Member
Photogenic
Photoriffic
 
Joined: Nov 2001
Posts: 29,404
Likes: 0
From: Houston, TX
Default Re: FLP vs SLP LT

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Jasc:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif"> I'm re-doing the y-pipe back. MTI is building me a custom 3" y-pipe, after that on the i-pipe I'll have a 3-1/2" cut-out with a QTEC electric gate, and after the cut-out is a 3-1/2" Borla XR-1 in place of the Loudmouth resonator.

Peace,
Craig.
</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Sounds cool Craig. Would like to hear it when ya get done.

Steve</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Sure thing Steve.
I hope to be done with it in a week or so.

Peace,
Craig.
Reply
Old Sep 28, 2002 | 12:06 AM
  #20  
Blue Fire's Avatar
On The Tree
 
Joined: Jun 2002
Posts: 109
Likes: 0
From: LA New Orleans Marrero
Default Re: FLP vs SLP LT

FLP's more power gains great off the line i would not go to any other header...... <img border="0" alt="[Firebird]" title="" src="graemlins/formula.gif" /> <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
Reply




All times are GMT -5. The time now is 02:07 PM.

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