GT/CS rear diffuser and non-stock mufflers

BritStang · 01-03-2008, 09:21 AM

I have a 2007 GT California Special and I'm thinking of installing the FRPP/Borla M-5230-5GT exhaust (just the axle back). Somewhere I remember seeing a comment that the rear diffuser on the CS can be melted by certain after market exhausts.

Does anyone have experience with this? I guess I should call Ford Racing to check, but wanted you guys' opinion first.

Current mods are BBK throttle body, Steeda CAI, XCal3 tune.

Many thanks,

BritStang

r3dn3ck · 01-03-2008, 09:56 AM

keep decent clearance between plastic bits and hot ass exhaust and you should be fine. I use 1/4" as my minimum space. Pipes with oversize chrome tips, maybe a tad more.

BritStang · 01-04-2008, 06:41 AM

Cheers r3dn3ck, thanks for the tip.

rickles512 · 03-24-2008, 10:02 AM

I installed the FRPP GT "borla stinger" mufflers and the x-pipe kit from FRPP. I had the Flowmaster kit for the 05-07 GT before that as well. I have had no problems with my diffuser on my 07 GT/CS, with either set.

-Just FYI, the FRPP exhaust sounds awesome. I would go that route. The Flowmasters didn't hold up too well...IMO. had a cracked baffle on one after the warranty expired.

BritStang · 03-24-2008, 12:17 PM

Quote:

Originally Posted by rickles512

I installed the FRPP GT "borla stinger" mufflers and the x-pipe kit from FRPP. I had the Flowmaster kit for the 05-07 GT before that as well. I have had no problems with my diffuser on my 07 GT/CS, with either set.

-Just FYI, the FRPP exhaust sounds awesome. I would go that route. The Flowmasters didn't hold up too well...IMO. had a cracked baffle on one after the warranty expired.

Actually after much research I went with the Magnaflow magnapacks...I LOVE the sound. Not too aggressive, but super-deep bass at idle and throttle-off. When you get on it hard it's loud as hell without any crackle or ricing.

BritStang

rickles512 · 03-28-2008, 01:51 AM

So what made you decide to go with the Magnapacks? I was looking at Corsa, FRPP/Borla, and Magnaflow... and was even considering SLP's...

My Ford performance shop in the area didn't have those in stock, but had the FRPP stingers and the FRPP x-pipe converter.

I love the Borla-Ford Racing variant... looks the best on the car IMO...

they drone a little bit at 1800-2000rpm, but when I get on it with the x, it sounds like "I am legend..."

Post a sound clip...would love to hear your Magnapacks and setup...

I will try and get a clip of mine when it stops snowing...f ing chicago weather...

01-03-2008, 09:21 AM	#1 (permalink)
BritStang Junior Member Join Date: Sep 2007 Location: Houston, TX Posts: 21	GT/CS rear diffuser and non-stock mufflers I have a 2007 GT California Special and I'm thinking of installing the FRPP/Borla M-5230-5GT exhaust (just the axle back). Somewhere I remember seeing a comment that the rear diffuser on the CS can be melted by certain after market exhausts. Does anyone have experience with this? I guess I should call Ford Racing to check, but wanted you guys' opinion first. Current mods are BBK throttle body, Steeda CAI, XCal3 tune. Many thanks, BritStang

01-03-2008, 09:56 AM	#2 (permalink)
r3dn3ck Wowbagger hates me too! Join Date: Nov 2005 Location: Magrathea/California Posts: 7,015	keep decent clearance between plastic bits and hot ass exhaust and you should be fine. I use 1/4" as my minimum space. Pipes with oversize chrome tips, maybe a tad more. __________________ Built 5.5L 2v and Maximum Motorsports Max Grip box. www.squarerootofone.com My CarDomain Page

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01-04-2008, 06:41 AM	#3 (permalink)
BritStang Junior Member Join Date: Sep 2007 Location: Houston, TX Posts: 21	Cheers r3dn3ck, thanks for the tip.

03-24-2008, 10:02 AM	#4 (permalink)
rickles512 GT/CS 2007 Join Date: Mar 2008 Posts: 15	I installed the FRPP GT "borla stinger" mufflers and the x-pipe kit from FRPP. I had the Flowmaster kit for the 05-07 GT before that as well. I have had no problems with my diffuser on my 07 GT/CS, with either set. -Just FYI, the FRPP exhaust sounds awesome. I would go that route. The Flowmasters didn't hold up too well...IMO. had a cracked baffle on one after the warranty expired.

03-28-2008, 01:51 AM	#6 (permalink)
rickles512 GT/CS 2007 Join Date: Mar 2008 Posts: 15	So what made you decide to go with the Magnapacks? I was looking at Corsa, FRPP/Borla, and Magnaflow... and was even considering SLP's... My Ford performance shop in the area didn't have those in stock, but had the FRPP stingers and the FRPP x-pipe converter. I love the Borla-Ford Racing variant... looks the best on the car IMO... they drone a little bit at 1800-2000rpm, but when I get on it with the x, it sounds like *"I am legend..."* Post a sound clip...would love to hear your Magnapacks and setup... I will try and get a clip of mine when it stops snowing...f ing chicago weather...