Want Mid 70mph Speeds on your docile F-15X watercraft?  You have come to the right place!  This kit is no joke! and is to be used by experienced Personal Watercraft riders ONLY!   There is no stock boat on the water that can compete with your MACSBOOST F-15X Stage II.  93 (R+M)/2 octane is required.

This kit includes everything you need to take your F-15X to the next level.

- MACSBOOST ECU and Wiring loom 
- MACSBOOST F-15X Intercooler with Custom Bracketry and Ultra Flow all silicone piping
- MACSBOOST Pump wedge.

The I/C keeps intake temperatures down for the ultimate in sustained performance and gets the most from your ECU investment.  Horsepower is bumped up a modest 75 ponies at the prop!

*The ECU is reprogrammable and Tunable by the user.  Modify the map to your hearts content.  Software is included.

Updated tunes are available on our forums here.  You must be an existing customer to be given access to this area of our forums.

  GPS comparison graphs are available on our forums for a stage 1 F-15X. macsdomains.com/forums/viewtopic.php  We will try to post some recent Stage II data soon.