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backpressure?

backpressure?

buechecj7

Jeeper
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Location
silver lake michigan
Vehicle(s)
1978 cj7 304 1/2 ton axles 3 speed manual
I have a 78 CJ7 with edelbrock performer intake and carborator and hedman headers I am using. Single chamber flomaster mufflers should I run 2 1/2 or three inch back
 
The 2.5" will give more TQ the 3" more HP.
I prefer TQ in an offorad vehicle but it's your choice.
 
It is truly not necessary to pay the extra money for a 3" exhaust.
 

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