Engine Components – Drivetrain & Transmission

Shop 312 parts in our Engine Components selection, part of our Drivetrain & Transmission lineup at QuickShiftParts. Whether you're building a daily driver, a weekend track car, or a full-on race build, we stock the components you need from the brands enthusiasts trust. Every order ships fast from US warehouses with free standard shipping on orders over $99.

Top brands in this category include Yukon Gear & Axle, plus dozens of other suppliers across our 745,000+ part catalog. Popular sub-selections include Bearings, Hardware - Singles, Oil Baffles. All listings include real-time inventory, MAP-compliant pricing, and verified manufacturer part numbers.

Need help fitting Engine Components parts to your specific year/make/model? Use the vehicle selector above or chat with our parts specialists 7 days a week. We back every order with a 30-day return window, tiered free shipping (free standard at $99, free priority at $199), and a fitment-guarantee policy. QuickShiftParts is built by enthusiasts, for enthusiasts.

Browse 312 Engine Components products at QuickShiftParts. Engine Components groups several closely related part types together so you can compare options across price, brand, and inventory before drilling into a specific subcategory. Use the breadcrumb above to climb back up to the parent department, or pick a subcategory below to narrow the listing down to the exact OE replacement or performance upgrade you are sourcing for your build, daily driver, or shop project.

Every product card on this page links to a full product detail view that lists fitment, dimensions, weight, manufacturer part number, available pricing tiers, in-stock quantity, and shipping lead times. If you already know the year, make, and model of your vehicle you can apply it via the YMM selector to filter this listing down to only parts known to fit your build. Every fitment row in our database is sourced from manufacturer-authorized data so you can trust the match. We refresh fitment continuously and also surface any vendor-supplied fitment notes on each PDP so you have the full picture before checkout.

QuickShiftParts ships from authorized distribution partners across the US. Most orders ship the same business day they are placed, and orders over $199 qualify for free standard shipping in the contiguous 48 states. Returns are accepted within 30 days when the product is in original packaging and unused. If you have any questions about a part on this page, our enthusiast-staffed support team is one click away in the chat module at the bottom-right corner of the page. We answer fitment questions, help track shipments, and explain the differences between OE replacement and performance options for any part type in our catalog.

Use the filters in the sidebar to narrow this listing by brand, price range, in-stock status, and other attributes. We are constantly adding new part types to our catalog so check back often if you don't immediately see what you need. If you can't find a particular SKU, reach out via chat and our team will check whether we can special-order the part for you.