Exhaust... Legal or not??

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fenris

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would open headers damage my engine? i have a 1979 ford bronco 351m/400... would back pressure be an issue

 
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J&SBroncolvrs

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Your engine needs back pressure to produce torque. If you want loud I recommend no bigger than 2 1/2" exhaust and glass packs for dual, 3" for single exhaust.

 

muddrivermike

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Also Ive heard that if you have open headers, you have a chance of burning out the exhaust valves unless you have Titainium?or stainless steel?valves..I cant remember which it was... :unsure:

 

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