1W0528 Exhaust Flex Pipe Early Style Fits CAT Fits Caterpillar LoaderOne New Aftermarket Replacement Exhaust Flex Pipe (Early Style) Fits Caterpillar (Fits CAT) 963 Crawler Loader This aftermarket replacement exhaust flex pipe connects the turbocharger to the muffler on early style Fits Caterpillar (Fits CAT) 963 Crawler Loaders. The pipe ends differ from each other in style verify you need the early style pipe before ordering, as a separate late style part (OEM 7C7004) exists for later serial numbers. Important: This