3800 Modular Pulley System


46 reviews

This variant is currently out of stock

The pulley system includes HUB, pulley of your choice, 5 stainless socket cap button screws, and one barbed retainer to replace the breather bolt.

After removing the stock pulley our steel hub presses on using the same pulley tool used to remove the factory pulley. No jaw style puller should be used to remove a supercharger pulley. If it is used, it will destroy the pulley and possibly damage the supercharger.

Once installed, the hub allows quick changing of pulleys with an Allen wrench. The ZZP MPS allows you to change between pulleys depending on conditions - use one pulley for street use and a smaller for the track or when running high octane fuel. A modular pulley system is a must for those planning to continue to modify their car in the future.

Our pulleys come with 8 ribs on them, but a 6 rib belt will still work completely fine.


  • Pontiac Grand Prix GTP or 06+ GT
  • Buick Regal GS
  • Pontiac Bonneville SSEi
  • 04+ Impala SS
  • 04+ Monte Carlo SS

Pulley recommendations:

  • 3.5 pulley for 01-03 GTP/GS with ZZP PCM, Tstat, colder plugs, bolt in downpipe, and a cold air intake.
  • 3.5" for 2004+ Grand Prix recommended for cars with 1.9 rockers, Tstat, colder plugs, some exhaust work, and a cold air intake.
  • 3.4" for 97-00 GTP/GS with ZZP PCM, Tstat, colder plugs, bolt in downpipe, and a cold air intake.
  • 3.3" pulley requires a small cam or headers or any SS intercooler
  • 3.2" pulley requires a XP cam or a SS intercooler with 1.9 rockers.
  • 3.0" pulley requires larger injectors and a full size intercooler
  • 2.8" pulley requires a cam, intercooler, and headers.
  • anything smaller than 2.8" pulley and you should email us your specific mod list and octane.

How to begin mods to your 3800 car, click HERE.

Bolt torque spec is 72 inch pounds.

Customer Reviews
4.9 Based on 46 Reviews
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Cory F.
United States United States
04 monte 3.5

Easy install. Didn't need to remove the snout to install so that was great. Definitely planning on dripping sizes again. And this makes it so easy.

John N.
United States United States
works as should

works as it should. nothing more nothing less. very straight forward and just need a bit of mechanical knowledge and the pulley tool or a press to install correctly.

Tyler B.
Canada Canada
Looks great!

This pulley is a nice addition to the engine bay. The ability to swap out pulleys without the need for a special puller is really useful. Build quality is excellent, and install was a breeze with the ZZP Pulley Puller tool.

Chad S.
Canada Canada
Modular pulley

I’ve bought and installed this item before, I’m rather surprised at the gains and the difference in the cars behaviour from even a small change. I dropped pulley size from the stock 3.8” to the modular 3.6”, glad I did. My next upgrade was a 3” down pipe with the high flow cat, also from ZZP. Again a noticeable change. My next upgrade will be the front powerlog, also purchased from ZZP. I’ve kept modding conservative, no computer tuning, intercooler, etc. It is my daily driver/winter ******. I still average 30mpg on the highway, and maintain the engines infamous reliability. Although it’s close to 20yrs old, I can still outrun many newer vehicles.

Trevor M.
United States United States
Modular Pulley System

I love this system. Gave it a little heat and it slid right onto the snout. Would buy again

ZZPerformance 3800 Modular Pulley System Review