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

2 spiral flows in i pipe

Thread Tools
 
Search this Thread
 
Old Jul 7, 2010 | 09:42 AM
  #1  
gut's Avatar
gut
Thread Starter
Teching In
 
Joined: May 2004
Posts: 18
Likes: 0
Default 2 spiral flows in i pipe

Anyone tried two spiral flows in thier i-pipe to quiet things down? They claim they will reduce 5-7 decibels so im thinking two in a row should help reduce volume without killing flow. any thoughts?
Reply
Old Jul 7, 2010 | 09:45 AM
  #2  
01ssreda4's Avatar
TECH Senior Member
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (96)
 
Joined: Aug 2007
Posts: 24,241
Likes: 89
From: Turnin' Wrenches Infractions: 005
Default

Originally Posted by gut
two in a row should help reduce volume without killing flow. any thoughts?
Yeah I have a thought. Spiral flows don't flow good so how can two in a row be a good thing?
Reply
Old Jul 7, 2010 | 10:45 AM
  #3  
Cheatin' Chad's Avatar
TECH Addict
iTrader: (3)
 
Joined: Aug 2003
Posts: 2,561
Likes: 0
From: IL
Default

I can't say exactly how much flow you're going lose BUT you are going to see a significant loss in flow.From my experience these are not the best flowing pieces you're going to find. If you just want to drop the sound level and dont mind taking the HP hit go for it...
Reply
Old Jul 7, 2010 | 10:54 AM
  #4  
gut's Avatar
gut
Thread Starter
Teching In
 
Joined: May 2004
Posts: 18
Likes: 0
Default

Sorry , i neglected to mention that i will have an e-cutout before the spiral flows. Im just wanting to quiet down my catback for everyday driving.
Reply
Old Jul 7, 2010 | 11:05 AM
  #5  
01ssreda4's Avatar
TECH Senior Member
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (96)
 
Joined: Aug 2007
Posts: 24,241
Likes: 89
From: Turnin' Wrenches Infractions: 005
Default

O well in that case, it should be good
Reply
Old Jul 8, 2010 | 02:18 PM
  #6  
gut's Avatar
gut
Thread Starter
Teching In
 
Joined: May 2004
Posts: 18
Likes: 0
Default

Would a single high flow cat and a sprial flow be quieter?
Reply
Old Jul 9, 2010 | 03:44 PM
  #7  
gut's Avatar
gut
Thread Starter
Teching In
 
Joined: May 2004
Posts: 18
Likes: 0
Default

back to the top
Reply
Old Jul 26, 2010 | 05:04 AM
  #8  
Cheatin' Chad's Avatar
TECH Addict
iTrader: (3)
 
Joined: Aug 2003
Posts: 2,561
Likes: 0
From: IL
Default

No way of knowing. Different cats have different cell counts. a 200cell converter is quiter than a 400 cell converter. It will be much more expensive and I'd be worried the cat will foul out because it wont get the heat it needs to cook off contaminants that far back in the pipe.

Use the two spiral flows or any bullet for that matter. Louvered core bullets flow less and are a bit quieter that the perforated core bullets.
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




All times are GMT -5. The time now is 03:19 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