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Author Topic: doug Thorley fitment  (Read 2013 times)

Offline luckyz1369

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doug Thorley fitment
« on: December 26, 2010, 12:49:34 PM »
I have a 75 3/4 ton silverado 4x4 and was wondering if the thorley 300Y headers will fit my rig? Any feedback is appreciated! :-\
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Offline beastie_3

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Re: doug Thorley fitment
« Reply #1 on: December 26, 2010, 06:18:45 PM »
did you check to see what the PN says?
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Offline greenmonster

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Re: doug Thorley fitment
« Reply #2 on: December 27, 2010, 06:05:24 AM »
I had the same pair on my 75 k10.they fit great.They got some rust holes in them so I changed to so hookers.The thorleys make alot more power.
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Offline beastie_3

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Re: doug Thorley fitment
« Reply #3 on: December 27, 2010, 04:43:04 PM »
4-1 generally focus on HP, while tri Y focus on TQ, IIRC
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Offline luckyz1369

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Re: doug Thorley fitment
« Reply #4 on: December 28, 2010, 06:45:42 PM »
well I will be dropping the motor in tomorrow! I'll know for sure then! I made some measurements today and it looks good. Thanks for the help! I'll send pics when I get her done!
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