Whether your goal is looks, efficiency, or merely getting your engine running, pulleys are critical parts, and there are important factors that need to be considered when selecting them. If you're ...

The use of underdrive pulleys became common to the public in the 1970s, although the origin of the use of underdriven pulleys dates back to the earliest days of automotive racing. With constant ...

My previous M3, a 1997 3.2-liter sedan, dynoed 221 hp at 6200 rpm and 224.7 lb-ft of torque at 3950 rpm. There wasn't much left to do unless I was going to spend the mega bucks for real engine tuning.