Harley Twin Cam, 88 cu in, 3.780 bore, 4.000 stroke, 9.75:1
Please allow up to 2 weeks for delivery. If it is any longer, we will contact you.
Feel free to contact us to confirm delivery time before you order.

For shipping cost -add all the products you would like, then navigate to the shopping cart to calculate shipping quote.
Harley Twin Cam, 88 cu in, 3.780 bore, 4.000 stroke, 9.75:1
|
Make |
Harley Davidson |
|
Engine Size |
88 CI |
|
Model |
Twin Cam |
|
Bore (in) |
3.78 |
|
Stroke (in) |
4 |
|
Comp Ratio |
9.75:1 |
|
Dome CC |
8.6 |
|
Comp Height |
1.27 |
|
Piston Part Number |
M5013 |
|
Conrod Part Nmber |
PSR6161 |
|
Pint Part Number |
927-2500-15CP1C |
|
Locks Part Number |
927x073 SWL |
|
Rings |
RS111A-3780-5 |
|
Shelf (RPO) or Made to Order (MTO) |
MTO |
Proudly made in the USA by CP Carrillo Pistons!
- Fully CNC machined
- Balanced to +/- 1 gram
- Double forced pin oilers
- Forged from high strength 2618 alloy
- Designed for maximum performance, horsepower and reliability
- Complete kit includes two pistons, ring sets, wrist pins and clips
- Follow ring end gap and piston to cylinder clearances as per the supplied instructions
| Product Name | Harley Twin Cam, 88 cu in, 3.780 bore, 4.000 stroke, 9.75:1 |
|---|---|
| Brands | CP Carrillo |
Delivery & Freight
We are an Australian-based company that ships items nationally and internationally, usually within 48 hours of receiving your order. High-value items shipped internationally are sent via DHL Express, while lower-value items are sent via Australia Post Express unless otherwise instructed.
You can calculate shipping rates inside the shopping cart. After adding all the products you would like, navigate to the cart and click the ESTIMATE SHIPPING & TAX link. .
If you only see the Click and Collect shipping option, it means that your address was not validated correctly.
If you have issues calculating freight, please get in touch. We are happy to help.
Disclaimer:
Product images are for description purposes only. Actual product may vary.
Shipping calculations available at checkout.
If you are unsure, get in touch by emailing [email protected], messaging us on Facebook, or phoning us at +61 7 5645 1333 (8am to 2pm AET).
What information do I need to match these pistons to my engine?
You need the engine code, bore size, stroke, rod length, pin diameter and target compression ratio. These determine the correct piston compression height and crown design.
How should ring gaps be set for these pistons?
Ring gaps must be set by your engine builder based on fuel type, boost level and the intended rpm range. Forced-induction engines usually require larger gaps.
Are forged pistons suitable for street engines?
Yes. Forged pistons handle detonation and high cylinder pressure better than cast units. Your builder should set the piston-to-bore clearance to suit your application.
What is the recommended piston to cylinder clearance for the M5013 pistons?
For the M5013 pistons, a typical piston to cylinder clearance is around 0.0025" to 0.0030". However, it's crucial to verify this with your specific engine build and follow the manufacturer's guidelines for optimal performance.
What type of wrist pins are included with the M5013 piston kit?
The M5013 piston kit includes high-strength wrist pins designed to withstand the demands of performance applications. Ensure proper lubrication and fitment during installation to maintain reliability.
What is the significance of the dome CC value for the M5013 pistons?
The dome CC value of 8.6 for the M5013 pistons affects the compression ratio and overall engine performance. It is essential to consider this value when calculating the final compression ratio in conjunction with your cylinder head specifications.
Are there any specific machining requirements for the M5013 pistons?
Yes, the M5013 pistons may require specific machining to achieve the correct bore size and ensure proper fitment. Always check the bore diameter and follow the recommended clearances for best results.
What type of alloy are the M5013 pistons made from?
The M5013 pistons are forged from high-strength 2618 alloy, which provides excellent durability and performance under high-stress conditions typical in performance applications.