This is POWERCAP for the standard Opel / Vauxhall C20XE Inlet Manifold. Adding this part will result in more sensitive throttle and increased power. Inlet pipe diameter is 80 mm, small pipe diameter is 16 mm. Recommended ABS (or TPU) printing, mechanical and chemical post-processing.

Warning! Inlet pipe only on the right side! Not the standard direction of an inlet branch pipe.This part has been successfully used on a car prepared for road racing with a c20xe engine for more than two years.

I recommend after printing to align the irregularities of the plane under the throttle gasket. Use 240 grit sandpaper, then 500 or 1600 grit on glass and with added water.

Feel free to write to me if you need additional variants of shape or part size for your particular variant. I will gladly complete the additional options.

Works great with this gasket https://www.cgtrader.com/3d-print-models/hobby-diy/mechanical-parts/opel-c20xe-throttle-gasket