3 inch exhaust

MikeJones · December 1st, 2009, 12:57 AM

I'm looking at the mac cat back and its avaible in 3 inch tubing and 2.5 tubing. if i bought headers and custom x pipe all 3 inch tubing through 3 inch catback. will there be better gains? would the sound be deeper? and will it fit with a panhard bar or watts link? thanks guys

Lefty · December 1st, 2009, 01:00 AM

You'll be fine w/ 2.5". I wouldn't spend the extra $50 (or whatever it is). Not worth it unless you have a decent amount of boost IMO.

quiksilver225 · December 1st, 2009, 01:20 AM

what are your long term plans? if there is a blower in your future then you might want to consider the 3". if not get the 2.5", because honestly, 3" is too much for your car N/A.

Lefty · December 1st, 2009, 01:20 AM

Originally Posted by quiksilver225

what are your long term plans? if there is a blower in your future then you might want to consider the 3". if not get the 2.5", because honestly, 3" is too much for your car N/A.

Yep.

quiksilver225 · December 1st, 2009, 01:23 AM

you need some back pressure unless your boosting and with a 3" exhaust your gonna lose too much pressure.

jivepepper · December 1st, 2009, 02:21 AM

Mac makes 3" cat backs but no 3" lt's unless you cut the ball flange off the collector. Doesn't make sense.

MikeJones · December 1st, 2009, 10:16 AM

i plan on getting kooks longtubes. and i do plan on boosting in the future. and im not getting the headers until i find me a totaled off mach or cobra

MikeJones · December 1st, 2009, 10:18 AM

Originally Posted by quiksilver225

you need some back pressure unless your boosting and with a 3" exhaust your gonna lose too much pressure.

Will it hurt my car if i don't boost it for a few years?

MikeJones · December 1st, 2009, 10:19 AM

and does anybody know if it will be ok with a arm bar and watts link?

dcook_14 · December 1st, 2009, 10:51 AM

It's probably not going to hurt your car a ton. I mean if you never planned on going FI and you wanted to squeeze all the N/A hp you could out of your motor, then you'd be better off getting 2.5" exhaust. I'd say as long as you can find headers with a 3" collector and a 3" midpipe and you're serious about getting boost in the future then go with the 3" exhaust.

Just remember though, even if a company makes a header for 3" exhaust now, they may not still make them when you need them.

And as far as the rear suspension goes, you can't use any kind of tailpipes with a watts link that I know of. You'd more than likely be able to use a panhard bar though, they're simpler than a watts link. Call MM to make sure though (and I would suggest only using MM, or Griggs if you have the money, for your rear suspension needs)
888-378-8830
805-544-8747 (local)
MM

99GT35thLE · December 1st, 2009, 08:09 PM

I have MAC 3 inch off road pipes on mine and it sounds bad ass and runs great.

MikeJones · December 2nd, 2009, 01:01 AM

wow really nice. i'm planning on kooks longtubes custom o/r x then the mac 3" i think it'll sound great. haven't heard this setup yet.

dannyboy281 · December 2nd, 2009, 03:37 AM

i think it will sound good i think you be one of the firsts here with that set up... but my slp lm1 piping is 2.5" at least thats what i remember and i think it sounds great... id get it in 2.5 i think you be happy with them but like you said your going fi in the future so its your call

MikeJones · December 2nd, 2009, 10:27 AM

well when i get the midpipe and catback in the spring i'll post some videos hopefully.

~C~ · December 2nd, 2009, 10:30 AM

2.5 o/r and cat backs sound phenomenal. Of course that is under boost as well....but nonetheless.

December 1st, 2009, 12:57 AM	#1
MikeJones Hardcore Enthusiast 2002 Mustang GT 13.7@103 Join Date: Jun 2009 Location: Stoon, Saskatchewan Posts: 2,840 iTrader: 0 reviews	3 inch exhaust I'm looking at the mac cat back and its avaible in 3 inch tubing and 2.5 tubing. if i bought headers and custom x pipe all 3 inch tubing through 3 inch catback. will there be better gains? would the sound be deeper? and will it fit with a panhard bar or watts link? thanks guys __________________ Mod6 Bigbore Kooks (parting out 2v motor)

December 1st, 2009, 01:00 AM	#2
Lefty The Doctor '01 Cobra Vert. Join Date: Jun 2007 Location: Mechanicsburg, PA Posts: 27,386 iTrader: 11 reviews	You'll be fine w/ 2.5". I wouldn't spend the extra $50 (or whatever it is). Not worth it unless you have a decent amount of boost IMO. __________________ 2008 Acura TL Type-S (the daily) 2006 Yamaha R6 50th Anniversary Edition (the other toy)

December 1st, 2009, 01:20 AM	#3
quiksilver225 Hardcore Enthusiast 1999 Mustang GT Join Date: May 2008 Location: Pittsburgh, PA Posts: 1,278 iTrader: 0 reviews	what are your long term plans? if there is a blower in your future then you might want to consider the 3". if not get the 2.5", because honestly, 3" is too much for your car N/A. __________________ BBK CAI, March UDPs, Eibach Sportline Springs, MM C/C plates, Koni Yellows, Centerforce DF clutch, FRPP Billet Flywheel, B&M Pro-Ripper Shifter, BBK ceramic LTs, BBK catted X-Pipe, SLP LM1, EBC rotors, 4.10 FRPP gears 5.4 4V coming soon

December 1st, 2009, 01:23 AM	#5
quiksilver225 Hardcore Enthusiast 1999 Mustang GT Join Date: May 2008 Location: Pittsburgh, PA Posts: 1,278 iTrader: 0 reviews	you need some back pressure unless your boosting and with a 3" exhaust your gonna lose too much pressure. __________________ BBK CAI, March UDPs, Eibach Sportline Springs, MM C/C plates, Koni Yellows, Centerforce DF clutch, FRPP Billet Flywheel, B&M Pro-Ripper Shifter, BBK ceramic LTs, BBK catted X-Pipe, SLP LM1, EBC rotors, 4.10 FRPP gears 5.4 4V coming soon

December 1st, 2009, 02:21 AM	#6
jivepepper MM Fanatic Join Date: Mar 2006 Location: Under a sombrero Posts: 4,556 iTrader: 1 reviews	Mac makes 3" cat backs but no 3" lt's unless you cut the ball flange off the collector. Doesn't make sense. __________________ 2000 GT 665/540rwhp/rwtq On pump gas Best 1/4 638hp street tune 11.01, best trap 134MPH, 80*+day, 10.5" DD Cobra R's & 315/35/17 DR'S DYNO VID ---> http://www.youtube.com/watch?v=K9uOS732mdA

December 1st, 2009, 10:16 AM	#7
MikeJones Hardcore Enthusiast 2002 Mustang GT 13.7@103 Join Date: Jun 2009 Location: Stoon, Saskatchewan Posts: 2,840 iTrader: 0 reviews	i plan on getting kooks longtubes. and i do plan on boosting in the future. and im not getting the headers until i find me a totaled off mach or cobra __________________ Mod6 Bigbore Kooks (parting out 2v motor)

December 1st, 2009, 10:19 AM	#9
MikeJones Hardcore Enthusiast 2002 Mustang GT 13.7@103 Join Date: Jun 2009 Location: Stoon, Saskatchewan Posts: 2,840 iTrader: 0 reviews	and does anybody know if it will be ok with a arm bar and watts link? __________________ Mod6 Bigbore Kooks (parting out 2v motor)

December 1st, 2009, 08:09 PM	#11
99GT35thLE Hardcore Enthusiast 1999 GT 35th LE Join Date: Dec 2009 Location: Jacksonville, Florida Posts: 1,428 iTrader: 0 reviews	I have MAC 3 inch off road pipes on mine and it sounds bad ass and runs great. __________________ Drive it like you stole it

December 2nd, 2009, 01:01 AM	#12
MikeJones Hardcore Enthusiast 2002 Mustang GT 13.7@103 Join Date: Jun 2009 Location: Stoon, Saskatchewan Posts: 2,840 iTrader: 0 reviews	wow really nice. i'm planning on kooks longtubes custom o/r x then the mac 3" i think it'll sound great. haven't heard this setup yet. __________________ Mod6 Bigbore Kooks (parting out 2v motor)

December 2nd, 2009, 03:37 AM	#13
dannyboy281 MM Fanatic 2003 Azure Blue Mach 1 4,000 miles on the ODO Join Date: Mar 2009 Location: El Paso, Tx Posts: 4,423 iTrader: 0 reviews	i think it will sound good i think you be one of the firsts here with that set up... but my slp lm1 piping is 2.5" at least thats what i remember and i think it sounds great... id get it in 2.5 i think you be happy with them but like you said your going fi in the future so its your call __________________ FS: Mach 1 OEM Wheels 3K miles with NEW Nitto 555's 275/40/17's PM me http://www.moddedmustangs.com/forums...555s-rear.html

December 2nd, 2009, 10:27 AM	#14
MikeJones Hardcore Enthusiast 2002 Mustang GT 13.7@103 Join Date: Jun 2009 Location: Stoon, Saskatchewan Posts: 2,840 iTrader: 0 reviews	well when i get the midpipe and catback in the spring i'll post some videos hopefully. __________________ Mod6 Bigbore Kooks (parting out 2v motor)

December 2nd, 2009, 10:30 AM	#15
~C~ ~C~, The Other White Meat! Y2K YellowJacket GT ~TBD~ Join Date: Jun 2008 Location: West side B-More Posts: 1,710 iTrader: 2 reviews	2.5 o/r and cat backs sound phenomenal. Of course that is under boost as well....but nonetheless. __________________ BLOWN Bumblebeast! 370 rwhp / 381 ft lbs ~Tuned by JJ at WMS "Like the blind man says......We shall see...."

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