Diamond Pistons Competition Series Pistons for 2020-2022 F-350 SUPER DUTY, F-250 SUPER DUTY, 2021-2022 E-350 SUPER DUTY - 30921-R1-8
4 interest-free payments or as low as $—/mo with Affirm. See if you qualify
Compatibility
- Vehicle-specific fitment
- Review application details below
- Need help?
- Confirm fitment with us before ordering — (714) 202-7886
We list the engine platform a part is built for. That is not year-and-trim application data, so it does not confirm a fit on your specific vehicle.
- Install quoted on request. We fit parts in-house in Huntington Beach, but we do not publish a labor figure for this item — we would rather quote your car than guess. Call (714) 202-7886 or pick Install at HRC and add your vehicle details, and we will come back with the labor.
- Warranty & track disclaimer — read before you race it.
- Shipping & returns — rates and RMA terms.
- Installed in-house in Huntington Beach, CA — labor & service policy.
- Affirm and PayPal available at checkout.
More ways to pay at checkout
Diamond Pistons Competition Series Pistons for 2020-2022 F-350 SUPER DUTY, F-250 SUPER DUTY, 2021-2022 E-350 SUPER DUTY - 30921-R1-8
Pistons and Rings, Forged Aluminum, 4.230 in. Bore, 3.976 in. Stroke, Compression Ratio 10:1, +25.50cc Head Volume, Ford, Godzilla, 7.3L, Set of 8
Fulfillment
Available on backorder. Ship it, pick it up in Huntington Beach, or have HRC install it in-house — choose at checkout. Installation quoted separately; tuning is arranged through our tuning partner.
| Brand | Diamond Pistons |
|---|---|
| Manufacturer part # | 30921-R1-8 |
| Product line | Godzilla 7.3L |
| Part No. | DPP-30921-R1-8 |
|---|---|
| Brand | Diamond Pistons |
Platform-level fitment (Ford + GM, Phase 1). We publish the engine platform a part is built for — not year-and-trim application data — so nothing here confirms a fit on a specific vehicle. Confirm fitment with us before ordering: (714) 202-7886.
Commonly Needed With This
Parts builders usually buy alongside this one — gaskets, seals and hardware for the install. These are suggestions, not a verified fit: call (714) 202-7886 to confirm before ordering.
