UP49504 - LongTube Headers for Workhorse W-Series 8.1L (2001-2003)

Description:

One look at these LongTube Headers tells you how radically different they are from the stock exhaust manifolds. Constructed of heavy-wall, T304 series stainless steel, these headers have 5/8 inch-thick flanges that are welded on both sides for optimum reliability. They never crack, leak or fail. We do recommend using OEM exhaust manifold gaskets when installing.

Tuned-length tubes produce a huge reserve of low-end torque that proves its worth on every steep grade and short onramp. Now your Workhorse climbs faster and stronger, without the transmission struggling between gears. The muscle to stay in higher gears longer not only stops annoying "shift happy" performance, it lessens the load on your engine and transmission. Here's power to reach freeway speed sooner for safe merging and passing.

Applications:

• 2001-2003 W-Series 8.1L Chassis - Allison Transmission - EGR Equipped
• Can be modified to work on 2004+ W-Series 8.1L by blocking off the EGR tube on the right side header.

Kit Contents:

• Right Side Header
• Left Side Header
• Right Side Connector Pipe
• Left Side Connector Pipe
• x2 2 Bolt Flange Gaskets
• x2 3 Bolt Flange Gaskets
• EGR Flange Gasket
• x6 3/8"-16 x 1-1/4" Hex Bolts
• x6 3/8"-16 Hex Nuts
• x6 3/8" Split Lock Washers
• x6 3/8" Flat Washers
• x2 M8-1.25x30mm Double Ended Studs
• x2 M8-1.25 Hex Nuts