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2003 GMC Sierra Exhaust Headers & Manifolds

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Latest Customer Reviews

Kooks Street Headers Reviews


Reviewed By Edward J (ANDREWS, NC) Reviewed for a 2003 GMC Sierra —8/20/2016 5:22 AM

Perfect form fit easy install all hardware included most excellent product

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JBA Cat4ward Headers Reviews


Reviewed By Stephen S (Aptos, CA) Reviewed for a 2003 GMC Sierra —6/14/2015 6:39 AM

I am happy with the purchase

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Gibson Exhaust Performance Headers Reviews

Not Bad

Reviewed By Matthew M (Durango, CO) Reviewed for a 2003 GMC Sierra —10/29/2007 7:43 PM

I bought these headers for my 03' GMC Sierra with a 496 in it. I already had a flowmaster cat-back system which sounded nice but these really made it roar. They definitly boosted overal horsepower, and aided the exceleration. They were most notable in the bottom to mid range, but also give a little extra at the top. The only problem is it made my gas mileage go down about a mile, but its a 496, it has bad MPG anyway. They really are very high quality I highly recomend them.

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