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Mazda RX-7 LS swap (1979–2002)
Swap kits verifiedFB / FC / FD1 sourced swap recipe
LS Gen III/IV swap — moderate
Mazda RX-7 FD3S LS3 swap: Sikky Stage 3 package (includes wiring harness); T56/T56 Magnum; also offered for LS1.
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| Part | What | Price | ||
|---|---|---|---|---|
| Swap kit | Sikky Stage 3 RX-7 FD3S LS3 package w/ wiring harness Stage 3 FD LS3 | $4,384.91 Sikky, 2026-09-28 | Required |
Watch out for: Sikky transmission options per chassis: T56, T56 Magnum, TR6060 (and CD009 on some); the mount part number changes with the transmission. Driveshafts are for 4-bolt diff flanges; ABS vs non-ABS and steel vs aluminum change the part/price. Power-steering add-on kits: LS1/LS2 (PS104) or LS3 (PS104A).
Required parts we've priced so far: $4,384.91 (parts only, not a full budget — engine, trans, wiring and labor are extra. Try the swap cost estimator.)
Swap kit evidence
- Mazda LS Swap Kit Lineup (RX-7 FD bolt-on; FC parts) — Sikky (kit-verified)
Questions about this swap
Every LS swap also needs
An oil pan that clears
Compare GM LS pans by sump position and depth.
Accessory drive spacing
F-body, car, truck and Corvette offsets.
Fuel system sizing
Injector and pump sizing for your power goal.
A transmission
4L60E to 8HP70 behind an LS.
Sources