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B1 heads only please but I am soon going to be having a set of headers made for my B1 headed 572. Probably going to be a stepped header type design but what are you guys running. This will be for a nitrous combo. Thanks

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John,
Mines 2 1/2" with 5" collectors...Not saying you need this size,but know one has been faster with B1 originals than us with our/your type car...Your gonna have more torque than you can use at the start and can use all the HP it can make out the back door !!

Just sayin !!

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Thanks again guys. I have more room than I thought I would but shes not bolted in yet.