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engineermike

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Mjschneidy said:
That header flange bolt pattern looks different to me from the 5.0L. Looks like it’s upside down, the 2 close together holes should be on the bottom for a 5.0L gen 3
Click to expand...
This is correct. The gt500 (and probably gt350) manifolds won’t mate up to coyote heads.
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engineermike

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I bought the headers, cats, and x-pipe from GWIDO and they arrived today, everything just as described. He did an extremely thorough job of protecting the parts for shipping and he shipped them very quickly. Anyone considering buying anything else from him can do so with confidence.

Thanks @GWIDO !
 
olaosunt

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engineermike said:
This is correct. The gt500 (and probably gt350) manifolds won’t mate up to coyote heads.
Click to expand...
Not 100% sure if vice versa but GT manifolds /headers bolt on fine to GT 350 heads . You just use the holes that line up .
I would assume you would do the same if using GT350/500 headers on GT heads ?
 
MAGS1

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monte87 said:
Are those mufflers for active exhaust? Will they work with my 21 GT? Also will they fit under stock GT rear valance? Please let me know, im very interested.
Thanks Anthony

P.S. How much?
Click to expand...
GT500’s are active exhaust and the actuators should be the same. GT500 exhaust piping is either 2-3/4” or 3” diameter (GT is 2.5”) but that can be resolved with reducers. The valance clearance would be the biggest issue in my mind as the 500 has 5” tips vs 4” on the GT. If you can mock up an extra 1” diameter on each tip on your car that’s probably your best way to check. Hope it works for you, those 5” tips would look great.
 

engineermike

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olaosunt said:
Not 100% sure if vice versa but GT manifolds /headers bolt on fine to GT 350 heads . You just use the holes that line up .
I would assume you would do the same if using GT350/500 headers on GT heads ?
Click to expand...
The coyote heads don’t have the dual bolt pattern like the 5.2. A 5.2 header isn’t going on it….
 
monte87

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MAGS1 said:
GT500’s are active exhaust and the actuators should be the same. GT500 exhaust piping is either 2-3/4” or 3” diameter (GT is 2.5”) but that can be resolved with reducers. The valance clearance would be the biggest issue in my mind as the 500 has 5” tips vs 4” on the GT. If you can mock up an extra 1” diameter on each tip on your car that’s probably your best way to check. Hope it works for you, those 5” tips would look great.
Click to expand...
Thanks Mags!!! I'm gonna do it tomorrow and see. If it does, im Golden!!! Appreciate yiur help and time to reply. !!
Anthony
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