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Old 12-12-2005, 10:56 AM   #1
FalconRS
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Impreza WRX To Wrap or Not To Wrap?

Well, tonight I'm finally going to have time to install my header, borla catback, and lightweight crank pulley. Problem is, I haven't had time to wrap the headers yet like I'd planned and that's a process that takes a few days to do right, so it's not like I can throw on the wrap and get it all done tonight.

So, should I hold off and just do the catback and pulley, and get started on the wrapping tonight, or should I say to hell with it, install the header and hope I don't get a cat code?
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Old 12-12-2005, 11:22 AM   #2
gtwagon941
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What header?
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Old 12-12-2005, 11:31 AM   #3
FalconRS
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eBay Borla-replica
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Old 12-12-2005, 10:09 PM   #4
saloonracer
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What would wrapping the header do anyway. I know it does something with heat transfer but what does it do specifically.

cheers
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Old 12-12-2005, 10:16 PM   #5
Tim Sanderson
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it makes it super pretty and keeps the heat in. The stock header is cast and it's pretty thick. The borla goes all over the place and is much longer so wrapping it is probably not a terrible idea.
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Old 12-12-2005, 11:07 PM   #6
saloonracer
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How about sound. The stock header is cast iron and it is thicker than the borlas. The borlas are noisy so would wrapping them do anything to the sound? EX. header noise
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Old 12-12-2005, 11:08 PM   #7
Charlie-III
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Borlas also had (have?) a tendency to crack even without being wrapped.

I never suggest wrapping headers on a street car.
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Old 12-13-2005, 01:11 AM   #8
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My exhaust guy told me that header wraps can crystalize, and bond to the stainless steel, and not come off. He advised that I not wrap my OBX headers, and ceramic coat them instead. I decided to just run them, and with about 3,000 miles on them now, they have held up beautifully. They get HOT, but they cool down pretty quick. I have a HFC, and I've so far not seen a CEL for inefficient cat.

-Gagan
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Old 12-13-2005, 09:38 AM   #9
jimbobrand
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Yeah, ceramic coating is the way to go and as long as they coat it on the inside and out wou won't get the cracking problems like you would with wraping.
-Jim
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Old 12-13-2005, 06:02 PM   #10
subygirl
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how much (generally) would a ceramic coat job on borla headers run?
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Old 12-13-2005, 06:32 PM   #11
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Wrapping them comes from keeping the gases hotter so they move faster, hence letting the engine breathe better. I would definetly coat them, they will help prevent, rust and cracking...plus help insulate. If thats not enough for you then you could wrap them as well. I recommend Swaintech coatings as an alternative to Jethott.
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Old 12-14-2005, 09:02 AM   #12
Subie Gal
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Quote:
Originally Posted by Charlie-III
Borlas also had (have?) a tendency to crack even without being wrapped.

I never suggest wrapping headers on a street car.

bah....

I'd wrap them. (again)


I've had my borla's on the car for 2 years now

wrapped since day one

no cracks. no CEL's. and i just passed emissions....


Jamie
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Old 12-14-2005, 09:40 AM   #13
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wrapping them(on a SS header) helps them rust faster for sure. if you live in a state with salt on the roads have them coated instead of wrapped. you'll thank yourself in the long run! unless you're made of money, then wrap away! -keith
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Old 12-14-2005, 01:58 PM   #14
veightkiller
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go ahead and wrap it..it's how much $50 bucks for the heat wrap and a couple of hours..why not?!?!?!
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Old 12-14-2005, 03:00 PM   #15
shemoves
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If you do wrap it though...don't use too much or make it thick...follow the instructions.
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Old 12-14-2005, 08:58 PM   #16
mattvct
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In my experience, wrapping headers does not have much of a negative effect and is worth it. If you're worried about cracking just don't wrap over welds where you've got two pipes coming together in a Y and you'll cut down on hot spots.
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