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05-09-2012, 12:45 PM
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#1 | ||||
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Registered User
Join Date: Jul 2000
Location: Southeast Wisconsin
Posts: 88
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Headers... chrome or coated??
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1994 Camaro Z28, K&N intake, PaceSetter, No cat, Flowmaster, MSD OptiSpark,Taylor, NGK Iridium IX Plugs, Bilstein BTS shocks and springs, BMR adjustable torque arm, lower controls arms and relocation brackets, adjustable panhard rod. Eagle 077 wheels, Cross drilled rotors, Red calipers, Clear corners. Last edited by GCEZ28; 05-09-2012 at 01:00 PM. |
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05-09-2012, 01:25 PM
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#2 |
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Registered User
Join Date: Oct 2006
Location: Post Falls, Idaho
Posts: 2,640
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Re: Headers... chrome or coated??
I really don't notice any difference. Might help some, but you won't get any real difference.
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1994 Z-28 LT1 A4, Supercharger 6 psi, 3.73 Gears, GMPP 1.6 Rockers, LT4 Springs, 42LB Bosch injectors, PCMFORLESS tune, All MSD ignition, Inline fuel pump, SLP sub frames, Panhard Bar, strut bar and rear control arms & LCA relocation, 1LE sway bar, Mid pacesetter's. 3" exhaust to Jegs electric cutout. Nitto NT555R Extreme Drag Radial 275/40R17 |
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05-09-2012, 02:32 PM
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#3 |
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Super Moderator
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Re: Headers... chrome or coated??
The cera-metallic coating, applied inside and outside the primaries, definitely reduces heat loss to the engine compartment. Additionally, it reduces external corrosion and cracking due to thermal cycling, and has been shown to produce couple extra HP by keeping the exhaust gas velocity high in the primaries, increasing scavenging. I wouldn't even consider buying uncoated headers for a street car.
Chrome does none of the above, and will discolor almost immediately. I have some modified AS&M headers that are now 15 years old. I bought them used 12 years ago. They have been subjected to the abuse of a 20+# boosted LT1 and my LT1 spraying a 300-shot. They came with an HPC cera-metallic coating, and they still look decent, with only minor rust around the weld splatter.
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Fred 94 Formula A3+1: 381ci all-forged stroker - Callies Stealth, Oliver 5.85 billet rods, BME nitrous pistons/CNC LT4 heads/Comp Cams custom solid roller/TH400+GearVendors OD/4.11's/Strange 12-bolt/300-shot N2O/Spohn Suspension/6-pt roll bar with integrated SFC's/full AutoMeter instrumentation/MoTeC M48 Pro engine management system/a few other odds 'n ends. My website is down. Hopefully, links/photos be restored in 2 or 3 weeks. |
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Injuneer's Formula|
05-09-2012, 05:18 PM
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#4 |
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Registered User
Join Date: May 2008
Location: Texas
Posts: 116
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Re: Headers... chrome or coated??
Chrome just won't hold up. It flakes, it rusts, it just looks like crap over time. That and as mentioned, no performance advantages to speak of.
I'm surprised companies are actually still chroming... though I realize a lot of the 'rod' crowd still use it for trailer queens.
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'97 M6 Z28 |
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05-09-2012, 05:18 PM
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