SKU: 43581379524

Active Autowerke Rotrex C38 Prima Kit - E46 M3

Sale price$4648.41 Regular price$5164.90
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Description

Active Autowerke Rotrex C38 Prima Kit - E46 M3As producer of one of the finest working supercharger systems for the BMW E46 M3, Active Autowerke is proud to introduce the PRIMA PLUS supercharger system capable of exceeding 500 WHP running on pump drawn 93 octane. The PRIMA PLUS is an upgrade to the existing PRIMA supercharger system designed to create MORE horsepower. In collaboration with Frank Smith of Tuning Tech FS, the Prima PLUS SC kit has evolved as a fantastic performer. With numerous

As producer of one of the finest working supercharger systems for the BMW E46 M3, Active Autowerke is
proud to introduce the PRIMA PLUS supercharger system capable of exceeding 500 WHP running on
pump drawn 93 octane. The PRIMA PLUS is an upgrade to the existing PRIMA supercharger system
designed to create MORE horsepower.
In collaboration with Frank Smith of Tuning Tech FS, the Prima PLUS SC kit has evolved as a fantastic
performer. With numerous dyno runs under countless hours all monitored through careful Data Logging and
Lean/Rich evaluation, this PRIMA PLUS supercharger kit is ready for the BMW enthusiast.
Special thanks goes out to Frank Smith and the guys at Tuning Tech,FS, a Active Autowerke Dealer in the
Maryland area to help launch this supercharger system.
The PRIMA PLUS is a centrifugal design supercharger using a conventional fixed drive pulley, but unlike it's
predecessors, the PRIMA PLUS also has variable boost settings of 9.0 psi and 9.5 psi to help attain the
power.
A first in the BMW forced induction industry.
For easy comparisons, here is where the PRIMA and PRIMA PLUS + stands when measuring rear wheel horsepower.
A stock BMW E46 M3 is around 265 WHP. PRIMA SC makes 425 WHP. PRIMA PLUS SC makes 500+ WHP. 

CUSTOMER IMPRESSION:
"...I intend to go to race fuel (104+) in the spring when I can drive it more.
So far the acceleration plants you into the seat. 1st and 2nd gear have the
rear tires searching for grip and I am running a 275 R compound tire. The
car feels alive and the power band is exceptionally characteristic of the
original power plant but just more power everywhere. There is no lag in
power delivery and is easy to modulate in partial and full throttle scenarios...."
MJTSUB
M3Forums member
BMW E46 M3 SC with AA PRIMA PLUS +

HOW DOES IT WORK:
Running without a front mounted intercooler, the PRIMA PLUS + relies on Water/Methanol and precise tuning to
make it happen. When activated by the flip of a switch, the system develops 9.5 psi of boost and 500 + WHP.*

The Water/Methanol system combined with proper software tuning performs flawlessly, but if a problem arises
such as a low WA/Meth fluid level, excessive detonation, etc. there a immediate safeguard built in.
The system will automatically default back to the 6.0 psi level to prevent any damage to the motor.

Now you can enter the F.I. realm with a proven company known for reliability and proven performance.
Active Autowerke invites you to Come Play with Power with your BMW.
*Dyno results achieved with stock motor on BMW E46 M3 running 93 octane fuel.
*Car equipped with exhaust mods like headers, section 1 and a rear exhaust.

KEY FEATURES:
Complete WA/Meth system
Designated trunk mounted WA tank with holding base
WA pump with internal seals and nozzles to accommodate methanol
Non intrusive mounting helps maintain existing factory trunk space (exception Convertible models)
Integrated wiring with fail safe features
Precise software tuning to match designated boost levels
Operates on 93 pump octane
Detailed Step by Step Instructions
PERFORMANCE SPECS:
Boost: 9.5 psi
Stock Horsepower: 333 HP @ 7900RPM
Supercharged Horsepower: 600+ HP @ 8100RPM
Stock Torque: 268 Ft Lbs @ 4800RPM
Supercharge Torque: 393 Ft Lbs @ 8100RPM

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 43581379524

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AMA
Omaha, US
★★★★★ 5
Fantastic, stylish, and easy shoes!
Size: 2.5 Little Kid, Color: Aqua/Multi
My daughter LOVES these and wears them daily. She says they're really comfy and they slip on easily. They've held up for several months of daily wear so far and are still going strong!
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Reviewed in the United States on September 15, 2025
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Janis H.
Los Angeles, US
★★★★★ 5
Great shoes
Size: 3.5 Big Kid, Color: Hot Pink/Multi
These shoes are awesome! Have good arch support and very comfortable
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Reviewed in the United States on May 12, 2026
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Shelby g
Draper, US
★★★★★ 5
Awesome shoes!
Size: 4 Big Kid, Color: Aqua/Multi
My daughter is SUPER picky about shoes and loves these. They are easy and quick to put on, run true to size, and most important COMFORTABLE. She is outgrowing them and will have to get her the next size up. Highly recommend for picky kids
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Reviewed in the United States on December 4, 2025
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LORI
Pawtucket, US
★★★★★ 5
LOVE THESE
Size: 3 Little Kid, Color: Hot Pink/Multi
Really nice. Pix don’t do them justice.
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Reviewed in the United States on May 27, 2026
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Working Momma
Natrona Heights, US
★★★★★ 5
Great for busy feet
Size: 13 Little Kid, Color: Hot Pink/Multi, Size: 13 Little Kid, Color: Hot Pink/Multi
My five-year-old daughter loves these Skechers slip-ins—and she is not easy on her shoes! You can see in the photo, she’s already put plenty of miles on them. They’ve been through the washing machine at least twice and still look great—the bright colors are a big hit with her and they hold up well in the wash. One of the elastic bands on top did come loose, but I was able to fix it quickly with a dab of superglue. She slips them on and off all by herself, which is perfect as we’re still learning to tie laces. All in all, a great purchase for the price—especially since kids grow so fast and put their shoes through a lot!
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Reviewed in the United States on May 24, 2025

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