BANKS REVOLVER HEADER 91-99 4.0L

Unlock the performance potential of Jeep's legendary inline-six engine with the Banks Power Revolver Header. Designed specifically for 1991–1999 Jeep Wrangler YJ, Wrangler TJ, Cherokee XJ, and Comanche MJ models equipped with the 4.0L engine, this performance header replaces the restrictive factory exhaust manifold with a carefully engineered tubular design that improves exhaust flow and overall engine efficiency.

Banks developed the Revolver Header to maximize exhaust scavenging and reduce backpressure, helping the 4.0L engine breathe more efficiently throughout the RPM range. The tuned tube design supports increased horsepower, torque, and throttle response while maintaining everyday drivability. Constructed from heavy-duty materials and engineered to withstand years of exposure to extreme exhaust temperatures and harsh operating conditions, the Revolver Header also addresses common durability concerns associated with aging factory manifolds. Whether you're restoring lost performance or upgrading your Jeep for improved power and responsiveness, the Banks Power Revolver Header delivers the quality, engineering, and reliability that have made Banks a leader in performance exhaust technology.

Non-deforming manifold outlet seal
Self-aligning exhaust seal will never compress or blow out - Bolts easily to stock exhaust

"Revolver" Collector
Banks' patented collector design with extended center tube is designed to pull the exhaust pulses from the engine for crisp throttle response on the draw

Manifold tubes fully welded
Each tube is welded to the flange twice, inside and out

Super-duty manifold flanges
1/2"-thick flanges never warp or crack - Computer-controlled machining - Precision port-match to cylinder head

Unrestricted Exhaust Ports
Tubes sized and shaped to match cylinder-head exhaust port

Precision-milled manifold flange
Milled dead-flat after welding, for durability and a perfect seal every time

Stainless Steel
Sustains exposure to ultra-high temps for superior durability - Mandrel-bent tubing for better airflow