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

Diameter of FLP Y-Pipe Merge?

Thread Tools
 
Search this Thread
 
Old Dec 30, 2002 | 10:38 PM
  #1  
Gary U's Avatar
Thread Starter
Staging Lane
20 Year Member
iTrader: (1)
 
Joined: Oct 2002
Posts: 72
Likes: 0
From: Chicagoland
Default Diameter of FLP Y-Pipe Merge?

I was looking at the photos of the recently posted rusty FLP setup. While I assume that the coating on that set was sub-par, I was interested in the Y-Pipe merge. I have seen these in person before, but never really noticed how small the diameter is where the two pipes come together. After merging into one at the smalles diameter, it looks like the pipe then expands, to what I assume is the stock diameter of 2.75". Does anyone know how narrow the pipe actually gets? With most cat-backs being 3", it seems like a shame to go to 2.75", let alone even smaller.
Reply
Old Dec 30, 2002 | 11:37 PM
  #2  
Dope's Avatar
TECH Fanatic
iTrader: (2)
 
Joined: Dec 2001
Posts: 1,648
Likes: 3
From: Wilmington, MA
Default Re: Diameter of FLP Y-Pipe Merge?

I don't know what it necks down to, but you have to remember that the collector on the y-pipe is expanded so the 3" intermediate pipe can fit inside of it. Kinda creates the illusion that the pipe before it is really small. I can't measure mine because it's on the car, but I would say minimum 2.75".

Dope
Reply
Old Jan 1, 2003 | 11:47 AM
  #3  
Gary U's Avatar
Thread Starter
Staging Lane
20 Year Member
iTrader: (1)
 
Joined: Oct 2002
Posts: 72
Likes: 0
From: Chicagoland
Default Re: Diameter of FLP Y-Pipe Merge?

Thanks for the reply, but I do not understand. The factory catback is 2.75" (both standard AND SS/WS6 version are the same). The factory catback expands to go over the factory y-pipe and has a welded on clamp. Therefore, I assume that the FLP Y-pipe should also go inside the catback pipe. This also follows conventional exhaust system practice with the forward pipes going into the latter pipes.

What am I missing here?
Reply
Old Jan 1, 2003 | 08:04 PM
  #4  
Dope's Avatar
TECH Fanatic
iTrader: (2)
 
Joined: Dec 2001
Posts: 1,648
Likes: 3
From: Wilmington, MA
Default Re: Diameter of FLP Y-Pipe Merge?

It's the other way around on the FLPs. The Y-pipe collector is expanded to fit the 3" intermediate pipe inside of it.

<img src="http://www.fear.net/~dope/camaro/exhaust/FLPs/complete-ypipe-installed.jpg" alt=" - " />

Here's my car. Look at the very top, you can see what I mean. The other 2 clamped locations are the same, the rear-most pipe being expanded.

Dope
Reply
Old Jan 1, 2003 | 09:21 PM
  #5  
Gary U's Avatar
Thread Starter
Staging Lane
20 Year Member
iTrader: (1)
 
Joined: Oct 2002
Posts: 72
Likes: 0
From: Chicagoland
Default Re: Diameter of FLP Y-Pipe Merge?

I understand. Nice pics, thanks.
Reply




All times are GMT -5. The time now is 06:17 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