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Doug Thorley Headers Part #THY-340-C Customer Reviews

Average Rating

2 Customer Reviews

Great performance gain

Reviewed by steve g (HIGHLAND, IN) Reviewed for a 2008 Pontiac Grand Prix — Mar 08, 2017 8:21 PM

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Great gain in performance, but did add a little more noise from exhaust.

Headers, the only way to go.

Reviewed by Michael N (Phoenix, AZ) Reviewed for a 2006 Pontiac Grand Prix — Jul 16, 2014 4:12 AM

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3 of 3 people found the following review helpful.

I have been looking for a set of headers for my car for sometime now. The Doug Thorley headers look great, sound mean, the price was right but they were a real chore to install. I would buy them again.

Doug Thorley Headers - THY-340-C

Shortie Header
  • $301.00 - $1,249.00
  • Free Shipping
  • Ships Between 3/19 - 3/21
  • What Do You Drive?


  • Style:
    Ceramic Coating
  • Part #:
  • Single exit header
  • Header comes equipped with mid-pipe or Y-pipe assembly
  • 1 3/4 inch primary
  • 2 1/2 inch collector
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