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Discussion Starter · #1 ·
Hi Guys, For those APS twin turbo owners which have been patiently waiting for the APS 3.5'' test pipes, here they are, hope you enjoy.

These monster test pipes bolt straight up to the turbochargers (the original cast housing is removed) to help reduce exhaust back pressure and to more quickly disipate the high exhaust gas temperature for high powered twin turbo engines. The high temperature of the engines exhaust gases are still expanding at the turbocharger and beyond, hense the size of the exhaust tubing in the first 18 to 24 inches of the exhaust system after the turbocharger is critical in high powered/high boost aplications.

The test pipes are constructed in 304 stainless steeel (tubing and flanges) and are internally and externally welded to ensure reliable long term operation.

More info here,

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