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Ok so lets say your turbo outlet to the DP is 3.5" and you got a DP that is 3.5 as well..and an exhaust thats 4" (HKS titanium)
So lets say now that we put a full 4 inch DP exhaust and it bolts up to the 3.5 turbo exhaust outlet. Your still bottlenecking at the exhaust outlet at 3.5" so doesn't it render the extra .5 inch moot? Obviously people don't think so....and I just wanted to know the argument for why I should go with a 4" DP when the DP I have is 3.5" and matches the exhaust outlet of the turbo...obviously having a 4" is just an overkill right? would the gains be worth the additional cost?
So lets say now that we put a full 4 inch DP exhaust and it bolts up to the 3.5 turbo exhaust outlet. Your still bottlenecking at the exhaust outlet at 3.5" so doesn't it render the extra .5 inch moot? Obviously people don't think so....and I just wanted to know the argument for why I should go with a 4" DP when the DP I have is 3.5" and matches the exhaust outlet of the turbo...obviously having a 4" is just an overkill right? would the gains be worth the additional cost?