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Snyder Performance Engineering


SPE Motorsport 2015+ 6.2 Hemi Hellcat HELLMAX Pulley Kit w/Titanium Hub & Install Tool

SPE 2015+ 6.2 Hemi Hellcat Pulley Kit w/Titanium Hub & Install Tool

SPE's ever expanding line of pulleys continues to grow. Our Hellcat line of pulleys gives the customer great flexibility and power gains for their 2015+ 6.2 Hemi platform. Including the Challenger, Charger, Durango, TrackHawk, Demon, and Ram TRX.

SPE offers our HELLMAX pulley setup for customers who want to add some power but don't want to have to tune their vehicle. In the Mopar world this can be a major pain. We have found through testing at different temperatures and elevation just how much boost we could add while still staying safely within the factory ecu parameters/limits. This allows the customer to turn up the wick with no need for costly tuning while gaining more power. 100% bolt on and go!

The SPE pulley system allows the customer to quickly change sizes with ease. This pulley system is the lightest available. You can find the SPE Motorsport pulley setups on the fastest stock blower cars in the country.

The patent pending CNC Convex Knurling process (CKP) on the SPE pulleys offers a perfect balance between belt grip and wear. The machining process allows the rib surface to offer varying grip under different belt loads. Under minimal boost (light Throttle) the belt tension is lower at the pulley face. The process offers a low load area for the belt to have normal factory like contact on the rib face allowing the belt to wear less over time. When load is applied it is wedged down into the Convex knurling the grip becomes more aggressive to the belt the higher the load (Boost demand) becomes.  This keeps the belt on a perfect grip/wear threshold. Unlike Laser surface etching found on our competitors pulleys our process doesn't degrade or wear off. Since our pulleys don't wear they are more consistent giving the customer better track times and dyno numbers.  Although SPE's CNC Convex Knurling Process is costly to produce we are more concerned with providing our customers the best quality product at the best price possible. 

SPE’s hub is engineered to be as light as possible without sacrificing strength and integrity. The SPE hub is available in both titanium and stainless steel options. The Titanium option is the lightest available supercharger hub on the market. Installs with our proprietary socket.

SPE offers the bolts in both titanium and stainless steel. While the stainless steel is available in polished only, the titanium is available in black, blue, bronze, and green anodized. 

Features and Benefits:

  • Increased boost
  • Less rotational mass
  • More horsepower
  • More torque
  • Stainless steel or titanium hub option
  • Stainless steel or titanium bolt options¬†
  • Multiple bolt color options (available in titanium only)

Kit Includes:

  • Pulley
  • Titanium¬†Hub
  • Hardware
  • Blower shaft holding tool
  • Custom hub socket¬†


For the customers who want way more power we have you covered as well!
*Other pulley sizes require tuning.
**The larger 3+, 2.9, 2.8, 2.7 pulleys are standard pulleys without our CKP, In certain applications the added grip isn't necessary with larger pulleys.
***SPE has many options to put together the perfect setup for your car. When deciding pulley sizing .100 smaller is equal to a 1 PSI increase depending on altitude. Not sure what you need? Contact us today.