Banks Power 51327 Revolver Header for 91-99 Jeep Wrangler YJ, TJ, Cherokee XJ & Comanche MJ with 4.0L

Performance Exhaust Header Upgrade: Replaces the restrictive factory exhaust manifold with a high-flow tubular header designed to improve engine breathing and exhaust efficiency.

Legendary 4.0L Jeep Fitment: Engineered for 1991–1999 Jeep Wrangler YJ, Wrangler TJ, Cherokee XJ, and Comanche MJ models equipped with the 4.0L inline-six engine.

Revolver Header Performance Design: Tuned primary tubes help improve exhaust scavenging for increased horsepower, torque, and throttle response.

Heavy-Duty Construction: Built from premium materials to withstand extreme exhaust temperatures and resist cracking under demanding conditions.

Direct-Fit Installation: Designed to mount in place of the factory manifold using existing exhaust and cylinder head mounting locations.

Additional Details

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

Installation Notes
Installation Difficulty:
Skill Level 3 -
Advanced
Tools Required: ¼" and 3⁄8" drive ratchets, extension w/ in. & mm sockets in. & mm combination wrenches Flat & Phillips head screwdrivers Standard & needle-nose pliers X-Acto knife Shop towels in-lb & ft-lb torque wrenches
Installation Time: 4-6 hours
Installation Instructions Available
Warranty
5 Year Warranty

Specifications

• Color: Silver
• Motor: 6cyl 4.0L
• Material: 409 Stainless Steel
• Shipping Weight: 18lb
• Shipping Dimensions: 31in x 20in x 8in (L x W x H)

Fitment

• 1999 Jeep Cherokee (XJ)
• 1998 Jeep Cherokee (XJ)
• 1997 Jeep Cherokee (XJ)
• 1996 Jeep Cherokee (XJ)
• 1995 Jeep Cherokee (XJ)
• 1994 Jeep Cherokee (XJ)
• 1993 Jeep Cherokee (XJ)
• 1992 Jeep Cherokee (XJ)
• 1991 Jeep Cherokee (XJ)
• 1992 Jeep Comanche (MJ)
• 1991 Jeep Comanche (MJ)
• 1998 Jeep Grand Cherokee (ZJ)
• 1997 Jeep Grand Cherokee (ZJ)
• 1996 Jeep Grand Cherokee (ZJ)
• 1995 Jeep Grand Cherokee (ZJ)
• 1994 Jeep Grand Cherokee (ZJ)
• 1993 Jeep Grand Cherokee (ZJ)
• 1999 Jeep Wrangler (TJ)
• 1998 Jeep Wrangler (TJ)
• 1997 Jeep Wrangler (TJ)
• 1995 Jeep Wrangler (YJ)
• 1994 Jeep Wrangler (YJ)
• 1993 Jeep Wrangler (YJ)
• 1992 Jeep Wrangler (YJ)
• 1991 Jeep Wrangler (YJ)