Anyone running 2.5" exhaust through a 65-66 GT style valence?

Cannoball888

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Dec 25, 2005

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Gainesville, FL

Sep 20, 2006

#1

• Sep 20, 2006

• #1

I originally was planning 3" but may just get 2.5" for simplicity. Anyone know of fitment issues running 2.5" pipes out the valence?

 

dodgestang

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Dec 15, 2003

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Cecil County, MD

Sep 20, 2006

#2

• Sep 20, 2006

• #2

They fit just fine.

 

D

DrStang

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Aug 22, 2004

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Sep 20, 2006

#3

• Sep 20, 2006

• #3

I've got 3"' pipes running out. Fit is tight but it works.

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1

1966conv

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Mar 5, 2004

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Sep 20, 2006

#4

• Sep 20, 2006

• #4

Same answer I gave in the other location. LOL

 

SoCalCruising

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Jul 25, 2000

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SoCal

Sep 20, 2006

#5

• Sep 20, 2006

• #5

Me, too.

 

dennis112

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May 15, 2005

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Amish Wonderland of Central PA.

Sep 20, 2006

#6

• Sep 20, 2006

• #6

I have 2 1/2" pipe to the rear of the car and then added 3" chrome extensions through the GT holes. The driver's side tailpipe runs close to the fuel tank. I added a radius to the tank to create more clearance.

 

Cannoball888

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Dec 25, 2005

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Gainesville, FL

Sep 20, 2006

#7

• Sep 20, 2006

• #7

dennis112 said:

I added a radius to the tank to create more clearance.

Click to expand...

Does that mean percussion engineered?

 

dennis112

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May 15, 2005

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Amish Wonderland of Central PA.

Sep 21, 2006

#8

• Sep 21, 2006

• #8

Cannoball888 said:

Does that mean percussion engineered?

Click to expand...

LOL, yeah, just a little.

I wanted to make sure I had at least 1/2" of clearance there.

I used a piece of 2" black pipe on its side and created a nice round crease along rear most side of the tank, near the GT opening. It was a really easy mod as the tank side offers little resistance.

 

G

GNN60GT500

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Jun 18, 2002

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5 car lengths in front of you!

Sep 21, 2006

#9

• Sep 21, 2006

• #9

Hey Cannonball, I work for Magnaflow and you will be better off going with the 2.5"

not that the 3" does not fit great which it does-

But I am running a supercharged 5.0 in my fastback and getting ready to do a head cam swap to put it somewhere in the neighbor hood of 450rwhp-

and I am sticking with 2.5"-

You have to be making some pretty serious power- over 500 rwhp (550-575 crank) to start looking at 3"

 

G

gp001

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Jun 30, 2001

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So. Cal.

Sep 22, 2006

#10

• Sep 22, 2006

• #10

I also have the 2.5" exhaust running out the rear valance

 

67Thunder

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Jun 19, 2005

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Vancouver, Canada

Sep 22, 2006

#11

• Sep 22, 2006

• #11

Question, on the magnaflow 2.5" exhaust is the inside diameter of the pipe 2.5" or outside, if it's the inside diameter of the pipe, what is the outside diameter?

thanks

 

Cannoball888

New Member

Dec 25, 2005

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Gainesville, FL

Sep 22, 2006

#12

• Sep 22, 2006

• #12

GNN60GT500 said:

Hey Cannonball, I work for Magnaflow and you will be better off going with the 2.5"

not that the 3" does not fit great which it does-

But I am running a supercharged 5.0 in my fastback and getting ready to do a head cam swap to put it somewhere in the neighbor hood of 450rwhp-

and I am sticking with 2.5"-

Click to expand...

The goal is the same for my 65 FB with a 306 roller so I was wondering about 2.5 vs 3" for the supercharger. Thanks for answering my question.

 

D

DrStang

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Aug 22, 2004

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Sep 22, 2006

#13

• Sep 22, 2006

• #13

I made an error on my previous post. These are 3.5" pipes. The exhaust is 2.5" however. Just wanted a different look for the rear.

 

S

Stanger'66

Member

Apr 30, 2006

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Sep 22, 2006

#14

• Sep 22, 2006

• #14

So the SS Magnaflow system WILL fit a GT valance? I always saw the tips on those systems installed below the valance, not in it. If it fits, I'll buy one.
Grant

 

Cannoball888

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Dec 25, 2005

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Gainesville, FL

Sep 22, 2006

#15

• Sep 22, 2006

• #15

You'll have to get an exhaust shop to modify it for valence exit.