Dyna Max Clutch Kit
MU 13-1.25 Con O
This Dyna Max kit features a performance organic lining on a marcelled fin. The pressure plate is modified for higher plate load and smoothness of engagement. This clutch was designed to cure premature disk failure due to high horse power and heavy hauling in the 5 speed and early 6 speed non-ETH 12 1/4″ clutches. We have taken the 13″ ETH clutch and modified it to accept the 1 1/4″ input shaft. By doing this, it enabled us to offer a disk center that is 2-3 times larger and stronger then can be provided in the 12 1/4″ clutch kits. This kit comes with a flywheel, re-drilled and refaced to accept the larger clutch and is rated to handle up to 350 horsepower & 750 ft. lbs. of torque. Years 1989-2005 5 speed & 6 speed non-ETH.
When choosing a clutch it is very important to match the appropriate horse power and work load. For example: The MU 0090 Rally and MU 0090 Con O are capable of handling the horse power and torque ratings provided in our listings, but if the truck is used for heavy hauling when coupled with torque ratings exceeding 600 ft. lbs. damage to the clutch disc WILL occur. The cause and effect is the 12 1/4″ disk does not provide enough dampened area to absorb the added torque of the Cummins along with heavy hauling. These two clutch kits are fine for light towing and performance. If you are going to be towing in excess of 8,000 lbs. while exceeding 600 ft. lbs. of torque you must go with the MU 13-1.25 Con O, OFE or FE. This will offer a clutch that will handle heavy towing with vehicles equipped with the higher torque ratings. This clutch only applies to trucks with 5 speed transmissions and early 6 speeds that are not equipped with the HO engine. If a 12 1/4″ clutch is purchased from us, or one of our distributors, and gets destroyed at the dampened portion of the disc, warranty will not be granted.
Do not try and save money when it comes to choosing a clutch. This will only cost you more in the long run.