Thread: H pipe in exhaust

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Navy, an H-pipe will balance the sound pulses and improve your exhaust note along with some minor performance improvement but if you really want to optimize use an X-pipe between the two. The X-pipe forces the gasses from the two streams to intermingle, improving scavenging of exhaust from the cylinders by using the velocity pressure of the other cylinders to essentially "vacuum" the combustion chamber as the exhaust valve opens, and especially as it is past the top and starting to close. You get the best of everything with the X-pipe, improved sound plus improved performance. An old tech article spells out some specifics - Exhaust System Installation H-Pipe, X-Pipe,- Car Craft Magazine

Good Read !! Thanks rspears !

Originally Posted by rspears

Navy, an H-pipe will balance the sound pulses and improve your exhaust note along with some minor performance improvement but if you really want to optimize use an X-pipe between the two. The X-pipe forces the gasses from the two streams to intermingle, improving scavenging of exhaust from the cylinders by using the velocity pressure of the other cylinders to essentially "vacuum" the combustion chamber as the exhaust valve opens, and especially as it is past the top and starting to close. You get the best of everything with the X-pipe, improved sound plus improved performance. An old tech article spells out some specifics - Exhaust System Installation H-Pipe, X-Pipe,- Car Craft Magazine