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01-08
GM - 8.1L Workhorse
Bulletproof 100% stainless; ultra-thick flanges welded on both sides; no need for sealant or gaskets; maximizes exhaust extraction and torque. Incl. heat shielding.
TorqueTubes® Manifold Assembly
One look at Banks TorqueTubes tells you how radically different they are from the stock exhaust manifolds. Constructed of heavy-wall, 400-series stainless steel, TorqueTubes have 5/8-inch-thick (0.625") flanges that are welded on both sides and then machined perfectly flat (no gaskets needed). They never crack, leak or fail.
TorqueTubes® 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.
| Application | Year Range | Part # |
|---|---|---|
| TorqueTube system W-series chassis | Allison 5-speed trans | EGR-equipped | 2000-03 | 49504 |
| TorqueTube system P-series chassis | GM 4-speed trans | EGR-equipped | 2000-03 | 49509 |
| TorqueTube system W-series chassis | Allison 5-speed trans | No EGR | 2004-07 | 49542 |
| TorqueTube system P-series chassis | GM 4-speed trans | No EGR | 2004 | 49545 |
| TorqueTube system W-24 chassis | Allison push-button trans | No EGR | 2005-08 | 49548 |
RV Today features Banks
It's an old episode but what Gale explains about the principles of improving the performance in your RV still applies today.
Accolades
“When I was at his [Gale Banks’] shop, I realized that he’s so immersed in diesel technology he could be Dr. Diesel.”
Jay Leno in Popular Mechanics (Sept '05)