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2003 GMC Sierra Exhaust Headers & Manifolds

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Latest Customer Reviews

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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JBA Cat4ward Headers Reviews


more power

Reviewed By rick t (WILMINGTON, NC) Reviewed for a 2002 GMC Sierra —12/6/2014 5:01 AM

They worked and sound great pick up my 1/8 mile speed 1 mile per hour to 84 mph not bad for a 5900lb truck ! Gain about 20 hp just changing to JBA headers.

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PaceSetter QuikTrip Long Tube Headers Reviews


my truck is a beast now

Reviewed By Luz O (RIO GRANDE CITY, TX) Reviewed for a 2010 GMC Sierra —7/30/2014 7:10 AM

Bought this based on the reviews but wow they are the best investment iv done to my truck so far.

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