Exhaust scavenging is the low-pressure condition within the manifold that helps clear out exhaust gas from the combustion chamber, replacing it with a fresh mixture of fuel and air for continuous power.
If you own a 1991 –1999 Jeep 4.0L, chances are your exhaust manifold is cracked. And it wasn’t even designed for optimal scavenging. Dozens of aftermarket companies have copied the design of the stock headers which have unequal-length tubes with several abrupt converging points along the primaries. We engineered our tubes to converge into a single collector to prevent colliding pulses of air, and inside the collector is our patented Revolver with proper scavenging.
Banks Torque Tube headers give you quicker acceleration and a substantial increase in horsepower and torque. And, unlike other headers, these are machined dead flat, not belt sanded. These are built to take the abuse only a jeep can endure.
1991-1999 Jeep Wrangler YJ/TJ 4.0L, 1991-1998 Cherokee
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