7.4L (300/330 HP)
MerCruiser 7.4 (carbureted)
Although a poor candidate for roots supercharging due to the heat produced from roots blowers, 7.4 motors are excellent candidates for Intercooled ProCharger systems, producing large percentage gains with low boost levels. Although these are lower compression motors, intercooling is mandatory due to the use of cast pistons in stock 7.4’s. The cast crank and 2 bolt main is sufficient for over 600 hp, but ATI recommends maintaining the factory redline for maximum longevity. There is no need for internal engine modifications prior to installing an Intercooled ProCharger, and power gains of 45-55% are typical with stock 7.4’s running pump gas.
Supercharger Systems
| YEARS | DESCRIPTION | POWER GAIN | BOOST | PART NUMBER |
|---|---|---|---|---|
| ALL | M-1 Intercooled | 45-55% | 5-7 psi | 1MA281* |
| ALL | M-1 Intercooled (12 rib) | 45-65% | 5-9 psi | 1MA222* |
| ALL | M-3 Intercooled | 50-90% | 5-12 psi | 1MA223* |
| ALL | M-5SC-121 Intercooled (12 Rib) | Call | Call | 1MA424* |
| ALL | M-5SC-121 Intercooled (COG) | Call | Call | 1MA425* |
*For carbureted motors, add “-MAG” to end of part number if Magnum motor, or add “-HP” to end if HP motor
New to procharger?
ProCharger superchargers are absolutely the most powerful and reliable supercharger systems available. These intercooled supercharger systems will deliver the largest increase in horsepower and torque available from any supercharger system. Thanks to the extremely low charge air temperatures provided by superior technology, ProCharger superchargers also provide much better engine longevity by protecting your motor from detonation. These systems are designed with a fundamental understanding of the physics behind supercharging, and are engineered to the highest quality standards and 100% made in the USA. Click to learn more about ProCharger superchargers!
BOOST YOUR TOW RIG
Whether towing your boat to the favorite watering spot or towing a trailer to some national park destination, ProCharger has you covered when it comes to adding a lot more ponies under the hood to your truck/suv (and car too)!
FIND A DEALER NEAR YOU
Looking to make a purchase or a shop to install? We have a large group of dealers ready to serve you with your ProCharger needs. Click below to find a dealer near you!
BUILD & PRICE
Kits starting at $6,998. Pricing on these units vary by configuration. Configure your purchase now.
New pricing becomes effective 4/28/23. Order now!
SPEAK TO AN EXPERT
Click to contact our sales staff or email us if you need any help. We will be happy to assist you with any questions you may have.
Mon – Fri 8am – 5:30pm CST
Phone – (913) 338-2886
Sales Email – [email protected]
EMISSIONS COMPLIANCE
ProCharger offers Executive Orders for Emissions Compliance (EO) from California Air Resources Board (CARB) for many of our most popular car, truck and SUV applications. If you live in California, we can only sell you products with EO certification. Check out our full list of EO offerings.
