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Flowmaster IN / OUT question...

 
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patyson
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2003 Chevrolet Impala


PostPosted: Sun Oct 21, 2012 3:22 pm    Post subject: Question Flowmaster IN / OUT question... Reply with quote

I have the Y-Pipe mentioned is this thread;

http://www.naioa.com/v2/module.....mp;t=46481

Will order the Flowmaster 40's as soon as I get a definitive answer here...even tho' I've been putting it off while buying other stuff,here and elsewhere.

Anyway,my question is,what do I want to get/need for the in/out of the muffler?
Size-wise I think I'm ok,but would certainly love feedback on that as well...but,moreso,the location of the in and out of the mufflers and what that choice would affect. As far as the out goes,will that ultimately determine where the tips end up?

Consider it "exhaust for dummies"

Thanx

P A Tyson

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Pitch Black SS
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2004 Chevrolet Impala
1982 Chevrolet Malibu
2007 Chrysler 300C
1986 Chevrolet Monte Carlo


PostPosted: Mon Oct 22, 2012 11:46 am    Post subject:   Reply with quote

location... Usually people go with offset inlet, center outlet on these cars.

Size, you need to match the outlet diameter of the Y pipe. From what it looks like, 2" is the closest to the 1.88" outlet.

With that said, I wouldnt have gone that route because of the 1.88" outlet. Not only is it a choke point, but it makes it hard to find mufflers to fit. I would have opted for a true 2.5" in and dual 2.5" out and had something fabricated.

Modding on the cheap is not a great idea.

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patyson
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Location: Richmond,Va.

2003 Chevrolet Impala


PostPosted: Mon Oct 22, 2012 8:12 pm    Post subject:   Reply with quote

Pitch Black SS wrote:
location... Usually people go with offset inlet, center outlet on these cars.

Size, you need to match the outlet diameter of the Y pipe. From what it looks like, 2" is the closest to the 1.88" outlet.

With that said, I wouldnt have gone that route because of the 1.88" outlet. Not only is it a choke point, but it makes it hard to find mufflers to fit. I would have opted for a true 2.5" in and dual 2.5" out and had something fabricated.

Modding on the cheap is not a great idea.


So I should not have bought in to "Overkill's" statement;

"The 1 7/8" duals is the same as stock but that's not a problem. Together they have more surface area than the single 2.5" pipe, they're not a restriction. Buy 2" in/out mufflers."

So,it may not be an "up to" 2.5" ,but,still an upgrade,correct? Or,should I simply not go any further with (2) 2" in/out mufflers? I mean,the Y-pipe was only $40...I can eat that if need be.

Thanx

P A tyson

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2003 Impala LS Sport / OverKill Tune / GM Handling Kit w/Don Rome Brackets / Timken Hubs / Custom Intake / HO 190A Alternator / Metal Coolant Elbows / U-Bend Delete / Polished Stainless SLP Superflo's / 18" Stainless Magnaflow Tips / LED SS Cluster / SS Spoiler / Molded Splash Guards / SLP Grille / Stock Tail Covers / 400W Pioneer Amp / 10" Kicker Comp Sub / Alpine 6x9's / Clarion HU w/Blue Backlit Impala script HU Mount / 18" 2010 Charger R/T Rims / Halo w/LED strip Headlights
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Pitch Black SS
NAIOA Owner / Founder
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Joined: Mar 08, 2004
Posts: 12756
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Location: Tullahoma, TN

2004 Chevrolet Impala
1982 Chevrolet Malibu
2007 Chrysler 300C
1986 Chevrolet Monte Carlo


PostPosted: Tue Oct 23, 2012 10:50 am    Post subject:   Reply with quote

its an upgrade over the stock single 2.25" tailpipe, but muffler and tip choices are limited unless you plan on welding 2" to 2.5" adapters onto the pipe. I would do that before the mufflers so you have the extra room after the muffler for the tip. Also, 2.5" muffler choices are greater and the configurations are better.

I picked up a stainless 2.5" to dual 2.5" magnaflow stainless Y pipe when I did my exhaust on the 04SS. Got it off ebay for $30. Had my local shop bend and weld up some pipe and added mufflers / tips. Entire cat-back, built to my specs, 2.5" from cat to tip in aluminized pipe (pipe near cat replaced after 7 years, rest still on car), ran me $425ish total (mufflers $65 each, tips $30, Y $30, tubing $240)

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