oR do you even know what they are, they bolt to the main caps on the crankshaft sometimes or right to the oil pan bolts, they stop the spray of oil that flies off of the crank while it spins. Has been proven to increase horsepower and FE over time, reduces parasidic loss. My quesion is for 30.00 bucks would you do it? it would go onto a 95 jeep cherokee 4.0 I6
here is the website
Crank Scraper