Wiseco Professional Chevy Small Block Piston Set of 8 – 4.020 in. Bore – 1.550 in. CH, -15.00 CC
$3,509.00
Zip and humm are available over the phone: (07) 5619 7869
Bore 4.020 in · Compression height 1.550 in · Volume -15.00 cc · Set of 8 · wrist pins included
Available to order – usually ships in 2-3 weeks
Check fitment by rego or VINFast AU-Wide Shipping
Returns within 30 days
12 month warranty
Will it fit your vehicle?
| Make | Model | Series | Years | Engine |
|---|---|---|---|---|
| Chev / GMC | — | — | — | — |
A dash means the listing does not narrow it down that far (for example no build dates are listed). Check with us if your vehicle was built near a model change.
Fitment listings are a guide. Not sure? Send us your rego or VIN and our team will check the part for your vehicle, before or after you order.
Description
Set of 8 Wiseco Professional Series forged pistons for the Chevy Small Block: 4.020 in (102.11 mm) bore, 1.550 in (39.37 mm) compression height and -15.00 cc crown volume. Wrist pins are included; rings are not.
What’s in the box
- 8 forged pistons
- 8 wrist pins (0.927 in / 23.55 mm diameter, 5115 steel, floating)
Rings are not part of this set, so order a ring set to suit the finished bore and the ring groove widths listed below: Wiseco piston ring sets.
Matching it to your Chevy Small Block
Crown volume is quoted as -15.00 cc: Wiseco use a negative figure when the dish or valve reliefs add volume to the combustion chamber. Work out the compression ratio for your combination (chamber volume, gasket bore and thickness, deck clearance) before you order.
The bore size is the finished bore these pistons are made for, so have the block measured and then bored and honed to suit, with piston-to-wall clearance set to Wiseco’s figure for part K431A2.
Material: 2618 aluminium, the low-silicon alloy usually chosen for boosted and high-load engines (it needs more piston-to-wall clearance than 4032).
Specifications
| Bore Diameter | 4.020 in |
|---|---|
| Compression Height | 1.550 in |
| Forging Type | FLAT |
| Piston Material | 2618 |
| Piston Quantity | 8 |
| Piston Volume | -15.00 cc |
| Ring Set Included | No |
| Skirt Coating | Yes |
| Wrist Pin Included | Yes |
| Wrist Pin Material | 5115 |
| Wrist Pin Outer Diameter | 0.927 in |
| Wrist Pin Style | Floating |
Boostline conrods listed for this engine family: Boostline Connecting Rod Kit | Chevy Small Block | ARP2000. Match the rod length to the pistons before you order.
More: Small Block Chev forged pistons · all performance pistons · Wiseco
Wiseco part number: K431A2
Shipped Australia-Wide
- Dispatched from within Australia with tracking.
- Available to order – usually ships in 2–3 weeks.
- Freight is quoted after you order – we confirm the cost to your address before dispatch.
- Delivery usually takes 2–10 business days after dispatch, depending on your location.
- Need your tracking number? Once your order has shipped, email sales@willysworkshop.com.au with your order number and we’ll send you the carrier and tracking details.
Freight question? Call us on (07) 5619 7869.
Additional information
| Make | Chev / GMC |
|---|
Warranty: 12 months from Willys Workshop
Sold and warranted by Willys Workshop. Parts carry our 12-month warranty against defects, from the date of purchase or installation (whichever is later), subject to any manufacturer terms and fair wear and tear (Terms & Conditions, clause 7.1(b)). This is in addition to your rights under the Australian Consumer Law, which cannot be excluded.
- 30-day change-of-mind returns on eligible items: unused, uninstalled and in the original packaging, with a Return Authorisation from us first. A 15% restocking fee applies and return postage is at your cost.
- Special-order or imported-to-order items, electrical parts, ECUs and tuners once registered, connected or flashed, parts that have been fitted or modified, and clearance items can’t be returned for change of mind. Your rights for faulty goods still apply.
- Refunds are made to your original payment method within 14 business days of us receiving and inspecting the return.
Full details: Returns & Refund Policy and Terms & Conditions.
Warranty claims are coordinated through Willys Workshop. Email sales@willysworkshop.com.au or call Warana (07) 5619 7869 / Oxley (07) 3377 3421 with your order number and a description of the issue.
