If two is a party, and three is a crowd, then four must be a rocking good time and the Polaris RZR XP 4 1000 is a concert on wheels. Polaris took the 107-horsepower engine they placed in the RZR XP 1000, extended the frame, added two more seats, and only added 217 pounds. The
Is your torque converter stifling your vehicle’s performance potential? If you’ve ever opted to keep your transmission out of overdrive to avoid burning the clutches out of your torque converter, then the answer is yes. According to Gary Bruce of the COMP Performance Group, TCI has found the solution to this performance roadblock. Introduced at
Q: I have built up a 1970 Monte Carlo with a 350. I want to run the car at the track, so I’m thinking I need to scrap my 1 5/8-inch primary headers for something bigger to help the engine make some extra top-end power. However, I don’t want them to be too free-breathing–I want to
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