SKU: SC8705-6
CP Pistons Piston & Ring Set – BMW/Toyota B58 82mm Bore 11:1 CR Set of 6
The CP Pistons forged piston and ring set for BMW/Toyota B58 engines. 82mm bore with 11:1 compression ratio, fully CNC-machined from high-strength 2618 alloy, delivers exceptional strength, lightweight design, and maximum power potential, the ultimate bottom-end upgrade for any high-boost, turbocharged, or race B58 build (BMW M340i, Supra A90, etc.).
Key Features
- 2618 Forged Alloy – High-strength material for extreme boost and RPM applications
- 82mm Bore – Stock bore size with precision machining for perfect cylinder fit
- 11:1 Compression Ratio – Ideal for high-performance naturally aspirated or moderate boost setups
- CP Proprietary Ring Set – Included rings for optimal sealing, reduced blow-by, and durability
- Complete Set of 6 – Full kit for inline-6 B58 engines (BMW B58, Toyota B58)
| Spec | Detail |
|---|---|
| Part Number | SC8705-6 |
| Brand | CP Pistons |
| Type | Piston & Ring Set |
| Bore | 82 mm |
| Compression Ratio | 11:1 |
| Material | 2618 Forged Alloy |
| Compatibility | BMW/Toyota B58 Engine (Set of 6) |
| Country of Origin | United States |
| Warranty | CP Pistons Limited Warranty |
Whats Included
- 6 x CP Forged Pistons (82mm bore, 11:1 CR)
- Matching CP Piston Ring Set
- Wrist pins and locks
- Installation instructions
Product Notes
- Designed for BMW B58 (M340i, X3 M40i, etc.) and Toyota B58 (Supra A90/A91)
- Supports high-boost turbo applications with proper tuning
- Recommended with ARP head studs and upgraded head gasket for high-power builds
Installation Notes
- Requires professional engine assembly
- Estimated time: Included in full engine rebuild
- Gap rings per CP specs; hone cylinders for optimal ring seating
This Part Fits
| Year Range | Make | Model | Trim / Engine | Notes |
|---|---|---|---|---|
| 2016+ | BMW | M340i / X3 M40i / etc. | B58 3.0L Turbo | 82mm bore 11:1 CR |
| 2019+ | Toyota | Supra A90/A91 | B58 3.0L Turbo | 82mm bore 11:1 CR |
Why Choose CP Pistons for B58?
- #1 choice for forged pistons in high-boost BMW/Toyota B58 engines
- Built & tested in the United States
- Chosen by tuners and racers for strength, lightweight, and power potential
Frequently Asked Questions
- Q: Does this fit my 2020 BMW M340i B58?
A: Yes, direct fit for B58 3.0L turbo engines (82mm bore 11:1 CR). - Q: Are rings included?
A: Yes, complete piston & ring set for 6 cylinders. - Q: Suitable for high boost?
A: Yes, 2618 alloy forged pistons designed for high-boost and race applications.
Shipping & Handling
- Method: Ground UPS or FedEx
- Availability: In stock – ships same or next business day
- Packaging: Official CP Pistons retail box
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