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JEEP Model, Year, and Engine We ONLY SUPPORT those vehicles and engines listed below. Grand Cherokee: No Products

S2572-0HX, Super Kit, Classic Polyurethane

S2572-0HX, Cherokee, Comanche 4.0L Header Super Kit, Polyurethane
S2572-0HX, Cherokee, Comanche 4.0L Header Super Kit, PolyurethaneSuper Kit
Price: $319.95
Part Number: S2572-0HX
Includes: Everything shown plus 1 sticker
Made in USA: Using USA steel, bushings, hardware, etc.
Warranty: Lifetime - Except bushings
Note: Mounts, brackets available separately
Super Kit: Includes Super Engine Brackets and Classic Polyurethane Motor Mounts - 1991-2001 4.0L Cherokee XJ, 1991-1992 4.0L Comanche MJ.
 
  • Super strong engine brackets for either original-style manifold or aftermarket header - 7 Bolts, Left; 8 Bolts, Right.
  • High performance Classic Polyurethane motor mounts - stock height. 
  • With regard to XJs and MJs, polyurethane mounts are only recommended for rigs that are doing heavy off-roading or other extreme uses.  Because of the unibody construction, Ultra-Flex rubber is recommended for daily drivers and light off-roaders.  You'll find these mounts a serious upgrade from OEM mounts.
  • All Grade 8 or M10.9 hardware, including new through bolts - you won't re-use anything.
Super Brackets feature more attach points than the original brackets. This design spreads engine block attachment stress loads. Left bracket features seven bolts, four more than the original. Right bracket features eight bolts, five more than the original. No engine block modification necessary. Bolts directly to existing 4.0L engine block bolt pattern originally installed on 1987-2001 Cherokee XJ and 19897-1991 Comanche MJ. Virtually eliminates offroad torsional forces snapping bolts or ripping the bracket from the case. Ideal for situations with one or more bolts already sheared or broken engine block threads.

Change to the Brown Dog engine mount system never have to do it again.
Both brackets and mounts are double-welded (inside and out) for exceptional strength. No robot welds. No rookie welders. Best of all, no big blob of rubber surrounded by a thin strap of steel here. All grade 8 hardware (or M10.9 equivalent). We're proud of our work. And the Brown Dog rests assured he'll never again run miles back to civilization due to a bracket failure. Backed by the Brown Dog promise. 


Designed to accommodate both original-style manifold and aftermarket headers. According to header manufacturer's warranty staff, one of the leading causes of cracked headers is worn motor mounts. (Of course, worn or missing exhaust hangars/brackets also can cause cracks.) This Brown Dog bracket design works with your original manifold or Banks, Borla, Pace Setter, Edelbrock, and many other common headers. The bracket and mounts, when used together, offer a little more room in the exhaust area to assure no conflict. So why risk cracking a header? Secure your engine and header in place with Brown Dog motor mounts and brackets.

Sheared engine block bolts? Broken bolt thread boss? This is your repair. While these brackets were originally designed for offroad exploration and to prevent broken bolts miles from civilation, the majority of our customers are repair shops using these brackets to 'save' an engine from the scrap pile. In fact, many XJ with sheared bolts and broken bosses have never been offroad, but suffered from years of potholes and rough railroad crossings.

High Performance Classic Polyurethane Motor Mounts feature all-steel, double-welded construction. Stock-height, these are high-strenth replacements for the originals. Designed to stand up to the toughest trails Arizona can dish out. (Sorry Utah, we can't stand the cold.) When compared to the originals and most others, these are a substantial upgrade. The original mounts, designed for smooth streets and highways, simply won't stand up to the torsional stress experienced offroad. 

Interchangeable bushings turn Classic Polyurethane mounts into Ultra-Flex Rubber mounts. Think you're going to use your Cherokee or Comanche mostly offroad so you ordered polyurethane mounts. Later you find yourself using the XJ or MJ as your work vehicle. If so, swapping out your polyurethane bushings to Ultra-Flex rubber is easy. Just twist out the polyurethane bushings and install the rubber bushings. Not sure whether to select Classic Polyurethane or Ultra-Flex Rubber? Compare here.

Ships with Grade 8 Hardware (or 10.9 metric equivalent) required to bolt engine brackets to existing engine block bolt pattern. Also includes new Grade 8 thru-bolts, prevailing-torque locknuts, and washers for securing brackets to motor mounts.

Application Notes: 

  • 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001 Jeep Cherokee XJ 4.0L.

  • 1991, 1992 Jeep Comanche MJ 4.0L.

  • If vehicle engine is from a Jeep Grand Cherokee or Jeep Wrangler, call to assure this kit will work.

Installation Notes:

  • In preparation for installation, we suggest using naval jelly or PB Blaster with a spiral wire brush to clean out the additional engine block thread bosses.  

  • A copy of the installation instructions showing which holes take which bolts will be included with your bracket. We can also email it ahead of time when requested.