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  #1 (permalink)  
Old 07 May 2005, 06:08 pm
Fresh Cruiser
Join Date: May 2005
Location: Carson, CA, USA.
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Default Exhaust....

Hello, I am wondering about the different sizes of exhaust, I was planning to get the BTG Duals Cat/Back but they are only 2 1/4"....I heard that if you will need a bigger size of exhaust to reach higher hp...if thats so...1)how much hp can these 2 1/4" let out? 2)If you have any better exhaust feel free to put in ur 2 cents
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  #2 (permalink)  
Old 07 May 2005, 07:48 pm
Fanatic Cruiser
Join Date: Dec 2002
Location: Livingston, TX, USA.
Posts: 764

Mopar "recommends" a 2 1/2" exhaust with the Stage 1 kit and was saying it was required with the ill fated Stage 2 kit that will never see the light of day for the PT. So the 2 1/4" is good for something like 250 hp. From 250-300 a 2 1/2" is needed. Above 300 you should probably be looking at 3".

2003 Almond GT AutoStick, body colored rear splash guards and hood struts, chrome gear shift, AC & vent knobs, billet steering wheel spokes and pedals, AMX1397 Turbo-Intake Pipe.
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Old 07 May 2005, 11:34 pm
Fresh Cruiser
Join Date: May 2005
Location: Carson, CA, USA.
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Default about these...
Noob w/ Cars....dont be mad \'03 Onyx Green GT Autostick
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Old 10 May 2005, 01:19 am
Young Cruiser
Join Date: Mar 2005
Location: San Bernardino, Ca, USA.
Posts: 92
Send a message via AIM to TurboCruiser13

Save yourself about 200 bucks off that mopar one and go take it to a muffler shop. I got mine done for 210 includes 2.5" all the way back, magnaflow SS resonator then splits over the axle and goes to 2.25" to the back. About the same loudness as the BTG just a slightly different sound.
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  #5 (permalink)  
Old 10 May 2005, 02:59 am
Senior Cruiser
Join Date: Oct 2002
Location: Riverside, Ca, USA.
Posts: 1,372

Pays your money picks your poison. the MOPAR/Borlas are quieter and fit like a glove the customs can be real expensive or real cheap depending on installer and products used. Most are a lot louder than MOPAR and dont make more power. Some like the extra noise! Some wipe out the spare tire carrier some dont. Some make a droning noise at certain speeds the MOPAR dont. If you dont add engine mods the MOPAR and others are just for looks and sounds.
06 GT Auto, Cool Vanila Exterior, Presto Change O 3bl, Cargo Mat and Net, Billet Oil Cap, Yoko Avid 4Vs Tires, 03 GT Wheels, 4 Chrome Door Handle Screw Covers, MOPAR Mud Flaps, H&R Rear Sway Bar, Freedom Strut Tower Bar, Rear Door Sill Covers.
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  #6 (permalink)  
Old 10 May 2005, 03:21 am
Veteran Cruiser
Join Date: Mar 2003
Location: Oregon.
Posts: 3,521

If you get a custom job make sure they do mandrel bends and not crimped ones. Most exhaust shops do not do mandrel bends, only some do. Crimped bends impede exhaust flow, mandrel bends do not.
\'05 Stone White SRT4

\'04 Graphite PT Automatic
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  #7 (permalink)  
Old 10 May 2005, 08:46 am
quicksilverdon's Avatar
Obsessed Cruiser
Join Date: Nov 2003
Location: Felton, Delaware
Posts: 20,501

My $.02.
If you want 2.5, better go for a bigger cat or you're choked by that anyway.
The BTGs, while "only" 2.25, are true flow-thru - you can see clear thru each piece. There are 3 sections that are larger with internal perforations (resonators) - but inside diameter stays 2.25 - can't flow much better than that.
IMHO they are a better design than the Borla, (or Bassani, which I had on my '02) which dumps into a muffler and sends a pipe "back" to passenger side. The BTG has a "Y" pipe splitter - some others come close, but have more of a "T".
The downside is that the BTG is pretty loud - but it's a Ballsy loud, deep, not Ricer. Look carefully at the layout of the different exhausts - the BTG makes the most sense to me.
(Cheapest I found was PTWarehouse - it doesn't say it's BTG, but it is).
THE PRECEEDING IS MY OPINION. Exhaust loyalty is nearly like tire loyalties...
"Anti-intellectualism has been a constant thread winding its way through our political and cultural life,
nurtured by the false notion that democracy means that 'my ignorance is just as good as your knowledge."
Isaac Asimov"

'05 Limited Turbo Lite, (Silver, of course)4-wheel ABS, Sunroof, Spoiler. Mods: E&G Classic grill, K&N FIPK, BTG duals, rear lowered 1.5", LED washer lights, $20 catch can, Aoogah horn, Weatherflectors, Sunroof Deflector, Fuzzy Dice, rear logo flames, rear pinstripe graphic, Gen3 Taillights, rear sway bar, hood struts, Strut bar.
Traded in '02 Silver Touring Edition w/87,000 miles
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  #8 (permalink)  
Old 11 May 2005, 06:43 pm
Fresh Cruiser
Join Date: Mar 2005
Posts: 18

Go to a muffler shop. I paid 325 for mine. 3" all the way back with a flowmaster. He used manderal pieces around the axle. Also, single 3 inch flows more than a dual 2inch. Sounds weird but its true. You can save money going to a muffler shop instead. Now I need to go back to the muffler shop to modify mine. I put eibachs on last week to lover the car. Now when I go over little bumps my exaust hit panhard bar on the axle. So if you go custom lower it first then do exaust.
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  #9 (permalink)  
Old 12 May 2005, 06:18 pm
Senior Cruiser
Join Date: Sep 2002
Location: Just south of the Mason/Dixon line
Posts: 1,713

another alternative is the TruBendz systems

or the HeartThrob systems at
'03 GT base w/175k and a 2 speed autostick (read: trans is shot) and powered by a hybrid MOPAR S3 with DSP untuned
1st Forward Motion E1 powered PTGT w/Psi-Fi Power pack fuel tuner back in '07
FS: '03 GT Elec Blue w/rear suicide doors or '03 auto PCM, S3 turbofold, WGA, 3.5" o2 & 3" DP - make offer
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  #10 (permalink)  
Old 15 May 2005, 03:57 pm
Cool Cruiser
Join Date: Dec 2003
Location: Gambrills, MD, USA.
Posts: 298

I have had the BTG catback for a little over a year now and love them. A little expensive at first but, stainless steel, will probably out live me.
Marty from MD
Black GT 03, BTG cat/back duals, rocket taillights, BTG shock strut bar, & Blane hood struts
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