Adding 10 Horsepower (or More!) for $100 (or Less!)
When it comes to bang for your buck, few bolt-ons can match the performance potential of a crank scraper. For the cost of a strip of sheetmetal, or about $10-$20 for an aftermarket part, you can install a scraper on your own engine that will reduce the frictional drag that happens when crankcase oil sloshes, or ropes, around the crankshaft as it rotates. Of course, this involves dropping the oil pan and doing some custom fitting of the scraper, but even on a mild street engine running at low rpm, a scraper can easily free up at least 5 hp.
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