Thread: Exhaust bore size for a 550hp yb
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Old Mar 30, 2019 | 09:38 AM
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Originally Posted by james kiely
On the ma developments 2.2 engine I bought it was running at 670bhp on a 2.5inch system and Mark said it would do 700bhp on a 3 inch system if I remember correctly
It was mark that advised me 3' inc baffles
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