Cart Optimizer for RockAuto

Find RockAuto warehouse-split shipping and the swap that ships your order together. Unofficial, not affiliated with RockAuto.

Ever notice your RockAuto order "ships from 3 warehouses," each with its own shipping charge? This extension shows you the math and helps you fix it, right on the cart page. Nothing leaves your browser. ── FREE: the analyzer ── Right on your cart, it shows: • How many warehouses your order splits across, and that each one adds its own shipping charge • The certain warehouse reduction available (e.g. "these items could ship from 2 warehouses instead of 3") and an estimated dollar savings • Which single item is "splitting" your order • Whether the split is even avoidable with your current brands, or exactly which part is the blocker The warehouse-count reduction is a hard fact from each part's candidate warehouses. Dollar figures are clearly labeled estimates — real shipping comes from RockAuto when you calculate it. ── PRO: the one-click fix ($10, one-time) ── Unlock the actual solution: • The exact brand swap to make: "Swap X → Y (+$1.00 part) so all items ship together (−$14 shipping). Net save: ~$13." • Fitment-aware: every physical-fit attribute RockAuto lists (left/right, front/rear, ABS, drive type, engine) is always matched, so you never get a swap that doesn't fit • Honors your rules: minimum quality tier, match material/grade, max price increase per part, optimize for shipping vs. cheapest-overall • One click applies the swaps at human speed, then re-checks the cart and shows predicted vs. actual, with one-click revert if RockAuto grouped differently One-time unlock, not a subscription. Didn't save you money? Full refund, just ask. Payment is handled securely by ExtensionPay (Stripe); the extension never sees your card. ── PRIVATE BY DESIGN ── • 100% client-side. No servers of our own, no accounts, no analytics, no data collection, no ad tracking. • Only runs on rockauto.com, and only reads the cart/catalog pages you actually visit. • All learned data stays in your browser and expires after 14 days. Estimates are labeled as estimates, and the extension always verifies its predictions against the real cart after applying. **Unofficial tool. Not affiliated with, endorsed by, or connected to RockAuto, LLC.** "RockAuto" is a trademark of its owner, used here only to describe compatibility.