Engine & Performance

88 premium-quality aftermarket direct-replacement listings for engine & performance parts — air filters, belts & tensioners, camshafts & crankshafts, cylinder heads, gaskets & seals, oil filters, sensors (oil, temp, etc.), turbochargers. Every listing shows its live price, stock and the trucks it is made for.

Parts in this category are listed for Kenworth, Peterbilt, Freightliner, Volvo, Mack, International, Western Star, Isuzu. Fitment is set part by part, so check the listing, run the free VIN lookup at partstop.net/vin, or match the number on your old part — or call (253) 600-1351 and we will confirm it for your truck.

No. PartStop sells premium-quality aftermarket direct replacements, not genuine original-equipment products. Manufacturer names and part numbers on our listings are used for cross-reference and identification only.

Orders placed before 3:00 PM PT, Monday–Saturday, ship the same business day; after 3:00 PM PT they ship the next business day. Standard delivery is 3–5 business days, with an Overnight option at checkout. Standard shipping is free on orders over $100, except oversized freight items, which show their freight charge before you pay.

We offer a 60-day return policy on unused items in their original packaging. If you receive a defective or incorrect part, we'll cover the return shipping and exchange it at no cost.

Every PartStop part carries a 6+ month warranty against manufacturing defects. If a covered part fails within the warranty period, we'll replace it. Contact support with your order number to start a claim.