Roush exhausts

[Dennis]

I have 2 mustangs, a 2016 gt 5.0 auto fastback, fitted a Roush cat back with H pipe, sounds OK, my other one a 2017 convertible also 5.0 gt with manual box I fitted the same exhaust, but it's a lot louder, any ideas on why ? how can I quieten it, I've disposed of oem back boxes and resonator ?

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[WildHorse]

Maybe it's louder cause it's a convertible.

 

[Dennis]

Maybe it's louder cause it's a convertible.

thanks for reply, no its a lot raspier, i fired up both alongside each other the ragtop is definitely nosier.

 

[slick_rick_]

thanks for reply, no its a lot raspier, i fired up both alongside each other the ragtop is definitely nosier.

Get any sound clips? I'm curious as to why......

 

[ZenkaiRacer]

Difference in mileage and packing wear?

 

[Mustanggtvert32907]

One have x pipe one just axle back?

 

[Ebm]

Fix the exhaust leak.

 

[MidwayJ]

I have 2 mustangs, a 2016 gt 5.0 auto fastback, fitted a Roush cat back with H pipe, sounds OK, my other one a 2017 convertible also 5.0 gt with manual box I fitted the same exhaust, but it's a lot louder, any ideas on why ? how can I quieten it, I've disposed of oem back boxes and resonator ?

Roush cat back comes with X-pipe, not H. Do you perhaps have one with H and one with X?

 

[Dennis]

they both have H pipes, i specified H for the cat back and the convertible you have to buy axleback and X or H.
The general opinion seems to be no apparent reason why.
EBM`s suggestion that there could an exhaust leak could be the answer so i`m going to remove it and start again.
Thanks for all the posts, appreciated.

 

[sjmurphy34]

they both have H pipes, i specified H for the cat back and the convertible you have to buy axleback and X or H.
The general opinion seems to be no apparent reason why.
EBM`s suggestion that there could an exhaust leak could be the answer so i`m going to remove it and start again.
Thanks for all the posts, appreciated.

instead of removing you could just spray soapy water on it and look for bubbling.

 

[Dennis]

instead of removing you could just spray soapy water on it and look for bubbling.

Thanks for all replies i think i might have the answer, visited a friend who has his own garage and he came up with a feasible answer, starting with the `17 cars some were fitted with sport cats, which answer the question !

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