Quote:
Originally Posted by Slippi84
So true paul but I liek I said in my earlier post I don't see a 420a at 250whp or less running maybe max 10psi pushing the obx to the limit as I ran a XS power mani with a 50 trim(yes I know trim is not a size but think fp green) at 20psi dd and it held up just fine.
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Exhaust gas pressure does play a role, but more importantly, the countless heat cycles coupled with a cheap alloy and thin walls is what concerns me. I'm sure the XS manifold did hole up fine, but for how long? Six months? A year? I bet it wouldn't last much longer than three years, if it even made it that far.
The types of failures I see happening with the OBX manifold won't happen overnight; they'll take a while to develop. If you want to buy a new manifold every year, then go for it; but I always try to look for a solution as permanent as possible.