I have the DBB 50 trim just installed in my car with all the supporting mods. It has the full ceramic coating and polished. Spool up on it is at 2900-3100 rpm. I hit 448hp on C-16 at 28 psi and 365 on pump 93 at 21 psi. This kit is awesome, not one complaint about the 50 trims, or any turbo kits from AGP for that matter.
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