Revolver Exhaust Manifold System 91-99 Jeep 4.0 Wrangler YJ/TJ 91-98 Cherokee Banks Power4. 0L 6 CYL: 1991 1999 WRANGLER, 1991 1998 CHEROKEE, 1991 1992 COMANCHE With more power, quicker acceleration, and tougher construction than ever, the new Banks Revolver out muscles any competitive exhaust manifold: period! You'd think that being made from super durable, mandrel bent 409 stainless steel tubing and sporting a 1 2 inch thick precision ported and machined flange was enough but there's more. The header is fortified with a Revolver