The Tangerine 616 Exhaust System is a custom high performance 4-2-1 header and muffler for street application on Porsche 356 and 912 616xx engines, based on the race proven Tangerine EVO design for Type 4 engines. Sound level is throaty but not loud at idle, and aggressive but not especially loud at wide open throttle. Based on results from our Type 4 exhaust systems, expected torque and power increase is about 10% in comparison to oem and typical aftermarket exhaust systems. Primary sizes available: 1 1/2" - for up to 1800cc, 1 5/8" -for larger displacements. Pipe length is optimized for redline at or below 6000rpm. Type 616 - 356 and 912 Our exhaust port transitions are computer designed and CNC machined to enhance flow from the rectangular port on the cylinder head. The header is mild steel, with alumino-ceramic high temperature coating inside and out for long life and reduced exterior temperature.  The muffler is T304 stainless steel with special baffling and 2 kinds of high temperature sound absorbing material.  Tangerine 616 Headers 356 with Dual Tips in Bumperettes Copyright © 2005-2013 The text and pictures on this site are the sole property of their owners. They may not be reproduced without permission! Last modified: January 13, 2013 Be sure to include correct address so accurate shipping charges can be added to the final invoice. International Orders: a 1% Cross Border Payment fee will be added with shipping/handling in the final payment invoice. Pricing 1 1/2" Stock System - $2095 1 5/8" Improved System - $2195 Ordering Shipping not included These systems are custom built to order and may take 6-12 weeks to produce. Several Muffler options are available. Multi-tip options have an increased price: Dual tip +$225, Twin Tip +$150 Wide Dual Tip (shown on 912) Porsche 912 Exhaust Port Transition Price includes:  High temp coated header, EVO II Silencer, mounting hardware