Italian RP (IRP) Forged Piston Kit
Forged pistons made from the highest quality alloys with extremely precise tolerances.
Designed to withstand heavy loads such as Stage 3 and Stage 4 builds and demanding motorsport use.
Available in multiple bore sizes and compression ratios.
Our selection also includes IRP piston + rod packages or rods separately according to your needs.
We also offer fully custom-dimension IRP pistons and rods – contact us for more details.
What’s included
- Forged piston set including pins, locks, and piston rings
- High-strength piston pins
- Reinforced pin locks
- High-quality piston rings for demanding use
- Piston materials and coatings according to selected package level
Kit levels
Choose the specification that fits your build:
- Silver – Most popular choice, excellent performance for tuned street and track cars
- Gold – Higher-grade materials and tighter tolerances for higher power goals
- Platinum – Top-tier package for extreme power, durability, and full racing use
Specifications
| Compatible models | MERCEDES AMG M113K (5.4LTR. V8 SUPERCHARGED) |
| Engine type | M113K 5400cc |
| Stroke length | OEM mm |
| Pin diameter | 23.000 mm |
| Designed for rod length | OEM mm |
IRP Forged Pistons
- High-strength forged alloy, resistant to detonation and heat
- Optimized crown and skirt geometry for controlled expansion and reduced friction
- Multiple compression ratios and oversizes for different turbo and fuel applications
- High-quality piston rings and heavy-duty pins included
Fitment & ordering
Parts are model- and engine-specific. Select bore size and compression ratio from the product menu.
If you are unsure about fitment, contact us via WhatsApp, email, or the contact form – our experts will be happy to assist you!






