BBK Performance 40060 User Manual

1996-2004 GM 5.0/5.7/4.8/5.3/6.0L

Full Size Truck Headers

Part#s 4005/0,4006/0,4007/0

INS 116

Step 1
Step 2

Step 3
Step 4
Step 5
Step 6

Step 7

Step 8

Disconnect the negative battery terminal and allow the engine to cool.

From beneath, remove the nuts that attach the Y-pipe to the factory exhaust
manifolds.

Unbolt and remove the factory exhaust manifolds and the stock gaskets.

Clean any old gasket material off of the cylinder head. Use a scraper if necessary.

Using the factory stock hardware and the supplied gaskets install the BBK headers.

Using the factory stock hardware and the supplied gaskets, attach the Y-pipe to the
BBK headers.

Using the supplied hardware, gaskets, and block-offs connect the EGR and AIR
fittings to the BBK headers where applicable

After driving the vehicle and allowing it to cool a few times, go back and retighten the
header bolts.