Over time all internal engine wear surfaces become worn. This is true for crankshaft journals, connecting rods, camshaft lobes, piston rings, bearings, etc. When rebuilding a worn out engine youll need to replace them all in order to regain the engines original performance. And, lets face it, Jeeps need all the power we can get. Omix offers new high quality replacement engine parts to get your Jeep back on the road. This replacement intake valve tappet fits 53 - 64 CJ3B, 55 - 71 CJ5 CJ6, 52 - 71 M38A1, 50 - 63 Truck Station Wagon, 50 - 51 Jeepster and 57 - 64 FC - 150 models equipped with the 134 ci F - Head engine. Sold individually use 4 per engine. Replaces OE 800550