Muffler replacement question


PeteK

GT Owner
Apr 18, 2014
1,260
Kalama, WA
Too loud. I actually drive my car regularly and on road trips.
 

mmlcobra

GT Owner
May 25, 2013
1,054
Too loud,,,,,,,,,,,,,,,,,,,no such thing!!!!!!!!!
 

roketman

GT Owner
Mark IV Lifetime
Oct 24, 2005
6,838
ma.
Also get some longer screws with 1/4 -1//2 inch spacers for your license plate.
Put the spacers between the plate and mounting holes . This will create some nice space for extra heat venting.
 

PeteK

GT Owner
Apr 18, 2014
1,260
Kalama, WA
I did that 5 years ago. I think you recommended it then.
 

MAD IN NC

Proud Owner/ BOD blah bla
Mark IV Lifetime
Feb 14, 2006
4,194
North Carolina
Just put a Heffner in today. Didn’t take bumper off but rear mesh grill, end diffuser pan to drop trans the 1”, rear mount on rear end, air box. That was it

took from when car came in to leave less than 4 hrs. No clamshell drop. 4th one I did for friends Heffner products keep getting better and better since I put mine in 2006

soon in for sale section Ford Racing Muffler (y)
 
Last edited:

extrap

GT Owner
Mark II Lifetime
Jul 16, 2020
272
N Cent FL
Just put a Heffner in today. Didn’t take bumper off but rear mesh grill, end diffuser pan to drop trans the 1”, rear mount on rear end, air box. That was it

took from when car came in to leave less than 4 hrs. No clamshell drop. 4th one I did for friends Heffner products keep getting better and better since I put mine in 2006

soon in for sale section Ford Racing Muffler (y)
I am definitely interested in the Ford Racing Muffler. I'll PM you for info. Thanks.
 

BIGFOOT

GT Owner
Jan 18, 2012
724
Northeast
Thnx for the continued input fellas
 

gtjoey

Keep Smiling - GT Owner
Mark IV Lifetime
Oct 14, 2005
3,413
Just put a Heffner in today. Didn’t take bumper off but rear mesh grill, end diffuser pan to drop trans the 1”, rear mount on rear end, air box. That was it

took from when car came in to leave less than 4 hrs. No clamshell drop. 4th one I did for friends Heffner products keep getting better and better since I put mine in 2006

soon in for sale section Ford Racing Muffler (y)
Handsome, you just put the Heffner now?
Its a lovely loud.....I did about 45,000 miles on 1316 with the heffner. Its is wonderful, when I get back in 1314 its so quiet, like a town car. Back in 2005 we thought the stock was loud!
gtjoey1314
 

MAD IN NC

Proud Owner/ BOD blah bla
Mark IV Lifetime
Feb 14, 2006
4,194
North Carolina
Handsome, you just put the Heffner now?
Its a lovely loud.....I did about 45,000 miles on 1316 with the heffner. Its is wonderful, when I get back in 1314 its so quiet, like a town car. Back in 2005 we thought the stock was loud!
gtjoey1314
Figures ya would think stock is loud where ya live :ROFLMAO:

I’ve put ~3 or 4 HefF’d in for the friends 👍

I’ve been running a Heffner since late ‘06. Still strong!
 
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gtjoey

Keep Smiling - GT Owner
Mark IV Lifetime
Oct 14, 2005
3,413
I understand, with all those deer and New Yorkers roaming around their now, you need something to make them jump! :)
gtjoey1314
ps the newer Heffner pipes have a better support bracket so they dont crack or seperate on track days.