Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
Am-Fm/map light National/Regional/Chapter NCRS "Top Flight"
#2-1985 Bright Red/Carmine Cp.L-98/auto
Member: NCRS, NCRS Texas, Corvette Legends of Texas
Header wrap will keep some of the heat down, but at a cost. It also keeps the heat in the headers. Some header manufacturers will not warranty them if they have been wrapped...it can cause the welds to fail, and pipes to crack prematurely. Wrapping the headers also create a condensation issue that can rust them out quickly, especially if the wrap gets wet. While header wrap has been around for many years, and many folks have used it, myself included, modern day coatings(Jet Hot, etc.) can keep the heat down without creating any adverse effects....other than the corresponding lightening of the wallet.
____________________________________ Joel Adams C3VR Lifetime Member #56 My Link
Vette(s): 1976 corvette L82 red interior with white seats and door panels with ceramic headers and flow master exhaust and a Crane Cam
Here’s how they work—ceramic coatings & exhaust wraps help contain the gaseous heat within your exhaust pipes. This causes the gasses to heat up and expand. Since the exhaust gas is trapped within the system, it expands the only direction it can—out of the tailpipe. As a result, exhaust flow is boosted, allowing a rush of fresh air to enter the engine’s cylinders, increasing horsepower. Both ceramic coated headers and exhaust wraps improve horsepower, so let’s go over their pros and cons and see which one is best for you.
Exhaust wraps may absorb moisture from the road and cause rusting if your tubes aren’t made from stainless steel
Ceramic coatings and header wraps are a sure way to add horsepower and a performance attitude to your motor. Even better, this highly-specialized insulation blocks intense engine heat that can rob your ride of horsepower and damage engine components. Our heavy-duty ceramic-coated exhaust accessories and sturdy wraps boost horsepower, while keeping your whip’s engine bay cool as a cucumber. This prolongs the life of hoses, wires and other temperature-sensitive accessories under the hood, letting you enjoy your car’s performance worry-free. To see which heat insulation methods work best for real-world driving, check out our exhaust headers customer reviews.
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I have ceramic coated Patriot Tight-tuck headers which are not wrapped. However, I also have 2 1/2-inch aluminum dual exhaust (Corvette Central) that I do have wrapped. I'm pretty sure they help keep down the heat and the wrap manufacturers claim that they help increase horsepower.
I am not worried about any rusting because aluminum corrodes but it does not rust. Rust refers only to iron and steel corrosion. Aluminum is actually very prone to corrosion. However, aluminum corrosion is aluminum oxide, a very hard material that actually protects the aluminum from further corrosion.
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