Wiseco 86.25mm Forged Piston Toyota Supra 2JZ-GTE 10.5:1 – W6678M8625AP
Wiseco W6678M8625AP Professional Series forged piston for the Toyota Supra 2JZ-GTE 3.0L 24V engine. Featuring an 86.25mm +0.25mm oversize bore, approximately 0.8cc crown volume and a quoted 10.5:1 compression ratio, this high-performance piston is engineered for demanding performance and motorsport engine builds.
- Engine: Toyota 2JZ-GTE 3.0L 24V
- Bore: 86.25mm (+0.25mm oversize)
- Compression Ratio: 10.5:1
- Material: Forged 2618 aluminium
- Compression Height: 33.99mm
- Skirt: ArmorGlide coated
- Includes: Piston rings and wrist pin
- Quantity: 1 individual piston
- Manufacturer Part Number: 6678M8625AP
Important: This listing is for one piston only, not a complete six-piston engine set. Professional engine measurement and machining are recommended before installation.
In stock
Delivery & Return
We aim to dispatch orders as quickly as possible using reliable UK courier services. Delivery times can vary depending on stock availability, supplier location and the type of product ordered.
Estimated delivery times are shown where available, but these should be treated as a guide rather than a guaranteed delivery date.
Some specialist, made-to-order, imported or supplier-direct performance parts may take longer to arrive. If you need a part by a specific date, we recommend checking availability before ordering.
Once your order has been dispatched, tracking information will be provided where available.
UK Delivery
We deliver throughout the United Kingdom.
Shipping charges are calculated at checkout based on the size, weight and destination of your order. Larger or heavier items may have an additional delivery charge.
Deliveries to the Scottish Highlands, Northern Ireland, Isle of Man, Isle of Wight, Channel Islands and other remote locations may take longer or incur additional charges.
International Delivery
International shipping may be available for selected products and destinations.
Import duties, taxes, customs charges and local handling fees are the responsibility of the customer unless stated otherwise. These charges are not included in the product price or standard shipping cost.
Please check your local import requirements before placing an international order.
Incorrect, Damaged or Faulty Items
Please inspect your order as soon as it arrives.
If your item is damaged in transit, faulty or different from what you ordered, contact us as soon as possible with your order number and clear photographs where relevant.
We will review the issue and advise you of the appropriate next steps.
Vehicle Fitment & Compatibility
It is the customer’s responsibility to check that a product is suitable for their vehicle before installation.
Please verify the vehicle model, year, engine, chassis code, part number and any relevant brake, suspension or drivetrain specification before ordering.
If you are unsure about compatibility, contact us before purchase with your vehicle registration or VIN and the product SKU where possible.
We cannot accept responsibility for incorrect fitment caused by inaccurate vehicle information, non-standard modifications or aftermarket conversions that were not disclosed before purchase.
Special Order & Made-to-Order Products
Some performance parts are specially ordered, imported, customised or manufactured specifically for a customer.
These products may be subject to different cancellation and return conditions. Where applicable, this will be confirmed before the order is processed.
Refunds
Approved refunds are normally issued back to the original payment method after the returned item has been received and inspected.
Original delivery charges and return postage may not be refundable unless the item is faulty, damaged or supplied incorrectly.
Please allow time for your bank or payment provider to process the refund after it has been issued.
Need Help?
If you have any questions about delivery, returns or product compatibility, please contact Performance Car Parts UK before ordering. We will be happy to help you check product details and fitment information.
Wiseco Forged Piston for Toyota Supra 2JZ-GTE
Upgrade your Toyota 2JZ-GTE engine with the Wiseco W6678M8625AP forged piston, developed for high-performance street, competition and serious engine builds.
Designed specifically for the legendary Toyota 2JZ-GTE 3.0-litre 24-valve six-cylinder engine, this Professional Series piston uses an 86.25mm bore, making it a +0.25mm oversize option compared with the factory nominal 86mm bore.
With a quoted 10.5:1 compression ratio and approximately 0.8cc piston crown volume, the W6678M8625AP provides an option for performance engine builders requiring a forged piston capable of operating under demanding conditions.
2618 Forged Aluminium Construction
The Wiseco Professional Series piston is manufactured from 2618 forged aluminium alloy. This material is widely used in demanding performance and motorsport piston applications because of its strength and ability to withstand high cylinder pressures and elevated operating temperatures.
Wiseco combines its forged construction with precision machining to provide the dimensional accuracy required in professionally built performance engines.
86.25mm Oversize Bore
The 86.25mm bore diameter is 0.25mm larger than the nominal 86mm factory 2JZ bore.
This makes the piston suitable for engines being rebuilt or machined to an 86.25mm finished bore.
Always have the cylinder block measured by a professional engine builder before ordering oversize pistons. Final bore and piston-to-wall clearance should be established using the actual pistons supplied and Wiseco’s recommended specifications.
ArmorGlide Skirt Coating
The piston incorporates Wiseco’s ArmorGlide skirt coating, designed to help reduce friction and improve resistance to skirt scuffing and seizure.
This coating is particularly beneficial in performance engines where the pistons may experience greater thermal and mechanical loading than in a standard road engine.
Precision-Machined Crown and Ring Grooves
The W6678M8625AP features a fully machined piston crown together with precision ring grooves and additional sealing features.
The design includes:
- Precision-machined piston crown
- Precision ring grooves
- Anti-detonation groove
- Ring-sealing enhancement features
- Forced wrist-pin oiling
These features make the piston suitable for serious performance-oriented 2JZ-GTE engine builds.
Floating Wrist Pin
The piston uses a floating wrist-pin arrangement and includes a high-strength 52100 steel wrist pin.
The pin diameter is approximately 0.866 inch / 22mm.
Piston Rings Included
Wiseco specifies a compatible ring set with this piston.
Ring dimensions include:
- Top compression ring: 1.0mm
- Second compression ring: 1.2mm
- Oil ring: 2.8mm
Always check ring end gaps during engine assembly and set them according to the intended engine power level, boost pressure, fuel and Wiseco or engine-builder recommendations.
Designed for Performance 2JZ-GTE Builds
The Toyota 2JZ-GTE remains one of the most popular engines for high-performance Supra builds thanks to its robust architecture and exceptional tuning potential.
A forged piston upgrade can form part of an engine build involving:
- Performance street engines
- Turbocharged builds
- Competition engines
- Track cars
- Drag racing applications
- High-output engine rebuilds
- Fully forged 2JZ-GTE builds
The correct compression ratio, piston clearance, fuelling, ignition timing and turbocharger specification should always be considered as part of the complete engine combination.
Toyota Supra 2JZ-GTE Application
This piston is intended for the Toyota 2JZ-GTE 3.0L 24V six-cylinder engine, commonly associated with the Toyota Supra Mk4 / A80 Turbo.
Fitment should be confirmed using engine code, bore diameter and engine-build specifications rather than vehicle registration alone, particularly where vehicles have undergone engine swaps or internal modifications.
Why Choose Wiseco Pistons?
Wiseco has extensive experience manufacturing forged engine components for performance, racing and motorsport applications.
The Professional Series combines:
- 2618 forged aluminium construction
- Precision machining
- ArmorGlide skirt coating
- Fully machined piston crown
- Precision ring grooves
- Forced wrist-pin oiling
- Floating wrist-pin design
- Performance-oriented piston architecture
For builders upgrading a Toyota 2JZ-GTE engine, the Wiseco W6678M8625AP 86.25mm forged piston provides a high-quality individual replacement or engine-building component.
Important Installation Information
This product is supplied as ONE individual piston.
A Toyota 2JZ-GTE six-cylinder engine requires six pistons for a complete engine build.
Because this is an 86.25mm oversize piston, professional cylinder measurement and machining may be required.
Do not machine the engine block based solely on the nominal piston size. Your engine builder should measure the actual pistons and establish the final bore clearance according to Wiseco specifications and the intended engine application.
Compression ratio may also vary depending on cylinder-head volume, head-gasket thickness, deck height and other engine-build specifications.
Product Specifications
Brand: Wiseco
Product Series: Professional Series
Product Type: Forged Engine Piston
Manufacturer Part Number: 6678M8625AP
Website SKU: W6678M8625AP
Engine: Toyota 2JZ-GTE
Engine Capacity: 3.0L
Configuration: Inline 6, 24 Valve
Bore Diameter: 86.25mm
Oversize: +0.25mm
Compression Ratio: 10.5:1 quoted application
Piston Crown Volume: Approx. 0.8cc
Compression Height: 33.99mm
Piston Material: 2618 Forged Aluminium
Skirt Coating: ArmorGlide
Forging Type: Strutted
Wrist Pin: Included
Wrist Pin Type: Floating
Wrist Pin Diameter: 0.866in / approx. 22mm
Wrist Pin Material: 52100 Steel
Ring Set: Included
Top Ring: 1.0mm
Second Ring: 1.2mm
Oil Ring: 2.8mm
Quantity: 1 Piston
GTIN / UPC: 00193564175755
Vehicle Application
Toyota Supra Mk4 / A80
Engine: 2JZ-GTE 3.0L Twin Turbo
Typical application period: 1993–1998 for the published Wiseco application.
Vehicle and engine specifications can vary by market and modification history. Confirm the 2JZ-GTE engine code and required 86.25mm finished bore before ordering.
FAQ
Is W6678M8625AP a complete set of six pistons?
No. W6678M8625AP is an individual Wiseco forged piston. Six pistons would normally be required for a complete 2JZ-GTE engine.
What bore size is the Wiseco W6678M8625AP?
The piston has an 86.25mm bore specification, which is approximately +0.25mm oversize compared with the nominal 86mm 2JZ-GTE bore.
What engine does this piston fit?
It is designed for the Toyota 2JZ-GTE 3.0L 24-valve inline-six engine.
What is the compression ratio?
The published application specifies approximately 10.5:1. Actual assembled compression ratio can vary depending on the cylinder head, head gasket, deck height and other engine specifications.
Are piston rings included?
Yes. Wiseco lists a piston ring set as included with this individual piston.
Is the wrist pin included?
Yes. A floating high-strength wrist pin is included.
Does my block need machining?
Because this is an 86.25mm oversize piston, block machining may be necessary. The cylinder bores should be inspected and measured by a professional engine builder before machining.
Technical Specification
| Brand | Wiseco |
| Manufacturer Part Number | 6678M8625AP |
| Website SKU | W6678M8625AP |
| Product Type | Forged Performance Piston |
| Series | Professional Series |
| Engine | Toyota 2JZ-GTE |
| Engine Capacity | 3.0L |
| Engine Configuration | Inline 6 Cylinder, 24 Valve |
| Bore Diameter | 86.25mm |
| Oversize | +0.25mm |
| Compression Ratio | 10.5:1 |
| Piston Crown Volume | Approx. 0.8cc |
| Compression Height | 33.99mm |
| Piston Material | 2618 Forged Aluminium |
| Skirt Coating | Wiseco ArmorGlide |
| Wrist Pin Type | Floating |
| Wrist Pin Diameter | Approx. 22mm / 0.866in |
| Wrist Pin Material | 52100 Steel |
| Top Ring | 1.0mm |
| Second Ring | 1.2mm |
| Oil Ring | 2.8mm |
| Piston Rings | Included |
| Wrist Pin | Included |
| Quantity | 1 Individual Piston |
Important: W6678M8625AP is an individual 86.25mm oversize piston. A complete Toyota 2JZ-GTE six-cylinder engine normally requires six pistons.
Professional engine measurement and machining are recommended. Final cylinder bore and piston-to-wall clearance should be established using the actual piston and Wiseco engine-building specifications.
Vehicle Fitment
| Year | Make | Model | Chassis | Engine |
|---|---|---|---|---|
| 1993–1998 | Toyota | Supra Turbo | A80 / JZA80 | 3.0L 2JZ-GTE Twin Turbo |
Engine Application
- Toyota 2JZ-GTE 3.0L 24V Inline-6
- 86.25mm finished bore requirement
- +0.25mm oversize piston application
- Suitable for applicable performance, rebuilt and forged 2JZ-GTE engine configurations
Important Fitment Information
This component should be matched primarily by engine code and finished cylinder bore, rather than vehicle registration alone.
The W6678M8625AP is intended for 2JZ-GTE engines requiring an 86.25mm piston. Vehicles with replacement engines, engine swaps, previously machined cylinder blocks or modified internal components may require different piston specifications.
Please confirm the following before ordering:
- Engine code is 2JZ-GTE
- Required finished bore is 86.25mm
- Required compression configuration is suitable for the engine build
- Cylinder block has been professionally measured before machining
Note: Compression ratio can vary depending on cylinder-head chamber volume, head-gasket thickness, block deck height and other engine-build specifications.
Delivery & Returns
UK Delivery
We deliver throughout the United Kingdom using reliable courier services. Delivery times vary depending on stock availability, supplier location, product size and destination.
Shipping charges are calculated at checkout where applicable. Larger, heavier, specialist or supplier-direct items may incur additional delivery charges.
Dispatch Times
We aim to dispatch in-stock products as quickly as possible. Some specialist, imported, made-to-order or supplier-direct performance parts may require additional processing time.
If you require a product by a specific date, please contact us before ordering so availability can be checked.
Tracking
Tracking information will be provided where available once your order has been dispatched.
International Delivery
International shipping may be available for selected products and destinations. Import duties, taxes, customs charges and local handling fees are normally the responsibility of the customer unless otherwise stated.
Returns
Please contact us before returning an item. Products should be returned in accordance with our returns policy and in suitable condition where applicable.
Special-order, made-to-order, customised or imported products may be subject to different cancellation and return conditions.
Damaged, Faulty or Incorrect Items
Please inspect your order as soon as it arrives. If an item is damaged, faulty or different from what you ordered, contact us promptly with your order number and clear photographs where relevant.
Vehicle Fitment
It is the customer’s responsibility to confirm product compatibility before installation. If you are unsure, contact us with your vehicle registration or VIN and the product SKU before ordering.
