There’s already a variety of turbo downpipes on the market but move over and find room for one more. This one stands out of the crowd though since it’s the new AMS cast downpipes. We’ve been following AMS’s progress on these and are pleased to see how they finally turned out.

Featuring cast end sections with stainless centers AMS say these are good for a huge increase in power (20hp peak, 25hp mid-range) and response when combined with the AMS turbo upgrades. They should do great things for stock turbo’d GT-Rs as well.

Check out the dyno graph in the gallery below showing power and torque on the same graph. The red line is AMS turbos with stock downpipes while the blue line is with the AMS cast downpipes. Quite a startling result.

Link: Discussion thread over on NAGTROC
Link: AMS Performance Website