Product Details
These Riaction TPU coilovers fit the 1967-1973 Datsun Bluebird (510N) Rear Coilover.
The Riaction TPU Coilovers for the 1967-1973 Datsun Bluebird 510N bring Riaction's digressive damper technology to the Datsun Bluebird, engineered for drivers who prioritize high-speed control, flatter cornering, and sharper response than a linear coilover can deliver. Each TPU set is built-to-order so valving and spring selection are matched to your exact Datsun Bluebird application, with the same 32-level damping adjustment and full-length ride-height range you'd expect from the Riaction platform. For 510N owners chasing a track-focused setup without giving up street composure, this 510N coilover kit bridges the gap between daily driver and weekend warrior.
Digressive pistons give the TPU a higher initial damping rate at low shaft speeds (body roll, weight transfer) and relax over big inputs (potholes, curb strikes), so you get better control without the harshness of a stiffer linear tune. Riaction coilovers for the 1967-1973 Datsun Bluebird ship fully rebuildable and backed by a 2-year warranty, making the TPU a long-term investment for enthusiasts serious about their Bluebird setup.
TPU Series Technology
- Digressive piston design — high control at low shaft speeds, compliant over big hits
- 32-level damping adjustment (1-Way)
- Monotube damper with seamless 52mm electroplated carbon steel body
- 44mm CNC-machined 6061 aluminum piston
- Built-to-order valving matched to vehicle and spring rate
- SAE9254 cold-wound linear main springs
- Multi-thickness valving shims for precise damper tuning
- Polyurethane oil seals and 7.5W suspension fluid
- Fully rebuildable — built to be serviced, not replaced
Features
- Full-length ride-height adjustment (preload-independent)
- 32 levels of damping adjustment
- Digressive valving for better control under load
- Front top mounts: OEM
- Rear top mounts: OEM
- Optional Swift Springs upgrade (sold separately)
- Built-to-order — 2-4 week lead time typical
- 2-year limited warranty
TPU vs GT1 — Which Is Right for You?
Both kits share the same 52mm monotube damper body, 32 levels of damping, full-length ride-height adjustment, and spring rates. The difference is in how the damper reacts:
| Riaction GT1 | Riaction TPU | |
| Damper valving | Linear piston | Digressive piston |
| Low-speed control (body roll, turn-in, weight transfer) |
Good | Sharper — higher initial resistance |
| Big-impact compliance (potholes, curbs, expansion joints) |
Follows damping curve | Softens — blow-off relieves harshness |
| Best for | Street, canyon, occasional track | Track-focused, autocross, aggressive street |
| Build | In stock | Built-to-order (2–4 weeks) |
| Price | Lower | ~$239 higher |
Short version: choose GT1 if you want the best daily-street-track balance and ship-ready. Choose TPU if you want tighter response under load and don't mind the lead time or the extra cost for a digressive tune.
Specifications
| Part Number | DS-005-SS-TPU |
| Part Name | Riaction TPU Coilovers |
| Vehicle | 1967-1973 Datsun Bluebird |
| Drivetrain | RWD |
| Chassis Code | 510N |
| Damping Adjustment | 1-Way |
| Damper Valving | Digressive |
| Ride-Height Adjustable | Yes |
| Spring Rate - Front | 5 Kg/mm |
| Spring Rate - Rear | 5 Kg/mm |
| Top Mounts - Front | OEM |
| Top Mounts - Rear | OEM |
| Suspension Design - Front | True Coilover |
| Suspension Design - Rear | True Coilover |
| Built-to-Order | Yes |
| Notes | Rear Coilover |
Fitment for Bluebird coilovers
Fits the 1967-1973 Datsun Bluebird (510N) Rear Coilover. Each model year is listed below.