Wiseco – Chevrolet, Small Block, Piston Set of 8
Price range: $1,438.51 through $1,898.73
or 4 interest-free payments from $359.63 with Afterpay on orders up to $2,000Zip and humm are available over the phone: (07) 5619 7869
Bore 4.125 in · Compression height 1.120 in · Set of 8 · wrist pins included
Fast 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
Wiseco forged piston sets for the Chevrolet Small Block, offered in 3 bore sizes: 4.040 in, 4.125 in and 4.160 in.
What’s in the box
- 8 forged pistons
- 8 wrist pins (0.927 in / 23.55 mm diameter, 5115 steel, floating)
- Ring set: depends on the option (see the table below)
Matching it to your Chevrolet Small Block
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 the option you choose.
Forging: slab-side design, with a coated skirt.
Options and part numbers
| Option | Wiseco part no. | Compression Height | Ring Set Included |
|---|---|---|---|
| 4.040 in | K413X4 | 1.250 in | Yes |
| 4.125 in | K104AS | 1.120 in | No |
| 4.160 in | K175A35 | 1.120 in | No |
Specifications (all options)
| Forging Type | Slab Side |
|---|---|
| Piston Quantity | 8 |
| 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
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 |
|---|---|
| Bore size | 4.040 in, 4.125 in, 4.160 in |
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.








