FM40's weld-in vs Catback

LouisianaZJ

Member

Feb 13, 2004

237

0

17

Jul 9, 2004

#1

• Jul 9, 2004

• #1

04 GT, w/an o/r H (MAC) otherwise stock.
How much difference am I actiually going to see with the weld in 40's vs' the mandrel FM american thunder catback?

 

LouisianaZJ

Member

Feb 13, 2004

237

0

17

Jul 9, 2004

#2

• Jul 9, 2004

• #2

btw, I was thinking about using the savings in cost to do the C/L plenum ($180) and a 70mm TB (not sure which brand)

 

JBushman73

Founding Member

Aug 29, 2001

172

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Roanoke, VA

Jul 9, 2004

#3

• Jul 9, 2004

• #3

I basically posted the same question earlier. I'm anxious to find out also since I have an 04 with Mac Offroad and FM 40's.

 

03redfiregt

New Member

Aug 4, 2003

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Dracut Ma

Jul 9, 2004

#4

• Jul 9, 2004

• #4

personally the differnence in horsepower your going to see between weld in mufflers and a full catback is very slight. your would'nt notice. But thats my 2c

 

twogts4us

15 Year Member

Apr 1, 2004

4,188

12

79

Dunedin, FL

Jul 9, 2004

#5

• Jul 9, 2004

• #5

Agreed - the difference will likely not be enough to notice, maybe 5 HP. BUT, if you plan to get headers, you'll want the full catback.
And some unwanted advice on the TB...buy what everyone tests with - the Accufab.

 

BNH4.6

Founding Member

Mar 15, 2000

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Canton GA

Jul 9, 2004

#6

• Jul 9, 2004

• #6

The only thing you will notice is a slightly deeper/ louder sound. SLIGHTLY!! Power wise maybe 2-3 rwhp maybe.

 

flashstang04

New Member

Jun 7, 2004

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Wichita Falls,Tx

Jul 10, 2004

#7

• Jul 10, 2004

• #7

I opted for the weld ins with a high flow cat pipe, and honestly, I can't tell a difference (power wise) between mine and a friends with the cat-back. An O\R pipe will be a little louder, but not much at all.