AMS Performance Full Street DownpipesAMS Performance VR30DDTT Street Full Downpipes are the best performing and most durable full 3 mandrel bent units on the market. During testing our shop Q60 with our VR30 Full Downpipes, and Red Alpha Tune, our Engine Calibrators saw 20 horsepower gains over our VR30 Race Lower Downpipes! The power came on earlier and the twin turbos spool up was significantly improved. The long gradual transitions within the mandrel bent pipe section allows exhaust