Hmmmm, 2.37" Milltek vs 2.5" AWE. What size is the standard downpipe and Capristo? Unlike turbo cars where bigger is better, an na motor can benefit from smaller diameter, it keeps the heat in so keeps the gas velocity higher.
Milltek have the highest gains I've seen on this motor at 20hp compared to Capristo's 14hp but I wonder if the restriction in the standard downpipe is holding the Capristo back by 6hp?
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