I too noticed a good difference when I had switched op nozzle on my old 650 SJ. Mainly in turning or carving whatever you like to call it.
When it comes to running bigger CC motors and aftermarket hulls. It would be a waste of time IMO.
I have a 1990 F-150 with the straight six! Gotta love that motor! Make sure you use an oil with a good supply of zddp for the beast. I use rotella t6 5-40 synthetic but they also make a 10w-30 conventional too!
What size diameter is the exhaust tube inlet and exit? I know on the 750sx and sxi it is 1 7/8 diameter. I heard that the pro's exhaust is 2". Just trying to confirm this.
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