2 1/2in BLOW THRU Upper Intercooler Pipe This 3 piece pipe set fits the GMAF30 Mass air sensor. Made from 2 1/2in dia. x 18ga mandrel bent steel tubing and includes our throttle body elbow. Order either full 2 1/2in (for BIG side mounts) or necked down to 2 1/4in at the IC (for stock side mount). It fits in front of the fuse box and requires trimming of the clutch line brkt to move the cable assy back (see photos) Air filter space is very tight but our K&Ns will fit with our VPC type intake pipes. Includes all SS hose clamps and couplings, four M8 X 70mm long throttle body bolts & washers. Your 2g metal TB gasket is reusable. Part Numbers: UIP-2gD