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Finally the JRSC Pulley Combo that ends belt and slipping issues.


This includes a pair of LHT / GripTec pulleys for the Jackson supercharger kit.


Tested ,designed and made in the USA


This fits the B series VTEC Kits only. 


This is the maximum Boost option. - 3.7" Upper pulley 


USE ONLY B16a /  ITR Crank Pulley  on B18 and B20 Blocks


Stock B16 and Stock Integra Type R use Lower boost kit - HERE




These are designed to use with the ITR / B16A Crank pulley for maximum safe Blower speeds upto  8800rpms.


This is the most common crank pulley that not only is the best balanced OEM Pulley, it has the lowest mass for quicker RPM accelaration.

*Use of large crank pulleys will over spin the Alternator and Supercharger.*


This is the most amazing pulley combo we've tested. With 25+ years of supercharger and serpentine belt experience, this is a game changer and we're excited to share it!


We we're the first to crack 300whp with the JRSC on a B series engine, runing pump gas. The problem was belt traction.

Typically to run more boost you run a smaller pulley on the Supercharger and a larger pulley on the Crank. First problem is the amount of tension needed for belt traction, this not only wears the belt extremely fast, if puts massive side load on the supercharger., and we've broken many superchargers to figure out the limits.

Now these supercharger kits are hard to come by, so protecting it is even more important! 


This pulley combo runs the least of amount of belt tension, while running the supercharger within it's safe limits.


Engine RPM can't exceed 8800rpms


Belt slipping issues are a thing of the past!


This includes:


1-Double Pulley for the Alternator

1 -Blower pulley with stainless hub


Belts not included.


Recommend Belt sizing:


 B16A  Upper belt   4PK639 ( Alternator to Blower)

              Lower Belt 4PK0800 ( Crank to Alternator )


 B18C  Upper belt  4PK650 ( Alternator to Blower) 

              Lower Belt 4PK0800 ( Crank to Alternator )




With countless runs on the dyno with our B18C5 Hatch and seeing the boost hold to redline, we were blown away with this combo.


You'll be running less belt tension, there's less wear on the belt, supercharger, idler and Alternator pulley.


Check out the Testing on our EG B18C5 Hatch









GripTec® Micro is a micro ablation machining process.  Our micro machining capabilities are near limitless and we apply our technology to give the target component an engineered surface design that optimizes the safest most aggressive gripping force possible.  Our multi directional machined ridges and valleys offer up more than just maximum gripping force they also act as escape ducts for trapped air and debris further helping in the mating of the target surface and belt. US Patent 9,421,637


 Belt slip is a very common issue on supercharged components.  In fact some units cranking out as much as 14-16 psi can take up to 200hp to drive.  Often the drive systems are plagued with slippage issues and builders find themselves moving to noisy cog systems, where belts have shorter life spans, are difficult to find at just any parts store and they can create more heat through the frictional movement of the cogs. 


Belt slip isn't always noticeable. Often belt slip is noticed when the system squeals, squeaks or boost falls off. Did you know that naturally the belt can slip a very small percentage even on NA vehicles, one major factor to belts wearing.  Belt wrap does play a key factor in minimizing belt movement but when it comes to driving a supercharger is hard to fully eliminate with just surface contact. .



 WARNING: California Proposition 65







3.7" JRSC LHT/GripTec B series VTEC

  • Items may be exchanged or returned within 30 days of purchase. Customer is responsible for return shipping and item must be unused in original packaging.  

  • We ship USPS Priority with tracking number. Customer is responsible for shipping cost. International shipping not available.

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