This Intake pipe puts the MAS very close to the stock position. It replaces the entire stock rubber intake pipe. The MAS end is 3 1/8in dia to match the 1g or GMAF30 MAS and tapers down to 3in or 2 3/4in at the compressor. Use this with Front mount IC's and a MAS before the turbo. General Notes for the following Intake Pipe: All Intake pipes are made from 16ga mandrel bent steel and powder coated inside and out except CIP-1gL All couplers and clamps are included Small tubes are not included. 2 3/4in size barely clears the 14b-16g waste gate actuator but will also work with the 20g. 3in size fits 20g and Garrett T3/T4's. 3 1/2in size fits largest Garrett T3/T4'st and GMAF35 or GMAF36. 4in size fits 4in inlet turbos. Part Number: CIP-1gM