01-16 Duramax ARP Exhaust Manifold Bolt Kit01 16 Duramax Replace your rusted, broken, or stripped stock exhaust manifold fasteners with high quality ARP bolts. Their durability and strength stand the test of time. This kit will do both sides of the engine and installs easily without any modifications. These high quality fasteners help eliminate any exhaust manifold leaks.

The TapShifter can be used in the gas or diesel 2003-2005 trucks with an Allison Transmission

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UPS shipping label included to return back core for free (USA only)

- Large 1-inch drain port

1/8" NPT port comes ready to use for your transmission temperature sensorComes complete with necessary hardware to bolt directly to factory location for a hassle-free installation

Coolant Streaks Near Gaskets

you must order 2 kits to replace all 12 valve springs

limit the range of gears to reduce gear hunting and keeping RPM high for quicker response

The cover can be locked open in any position along the rail to allow unlimited hauling flexibility and convenient use with a fifth-wheel trailer

Spool-up & More

Controls your converter lock-up clutch for pulling heavy loads up and down hills or dyno testing

The center mounted turbo flange is angled at an optimum 20° rather than 40º and helps with mounting S400