The IRP Forged Rods & Pistons are a complete bottom-end strengthening solution for the Porsche 718 Cayman & Boxster, engineered for high-boost, high-power, and motorsport-level builds. Designed to replace the factory powdered-metal internals, this forged rotating assembly dramatically increases strength, durability, and reliability under extreme cylinder pressures.
This is a foundational engine upgrade for serious Porsche 718 performance builds—built to handle power levels well beyond stock limitations.
The factory Porsche 718 engine internals are optimized for emissions, efficiency, and stock power output. Once boost pressure, ignition timing, or sustained load is increased, the OEM rods and pistons become a critical weak point—especially on tuned or track-driven vehicles.
IRP forged rods and pistons were developed to eliminate these limitations by providing significantly higher tensile strength, improved fatigue resistance, and superior thermal stability. This allows the engine to safely support aggressive tuning strategies, larger turbochargers, and prolonged high-load operation without compromising reliability.
Forged rods and pistons are engineered to withstand extreme forces generated by high boost, increased torque, and elevated RPM. Compared to factory internals, forged components offer dramatically improved resistance to bending, cracking, and thermal deformation.
Whether the goal is increased boost on the stock turbo or a fully built big-turbo setup, these forged internals provide the structural integrity required to safely push the Porsche 718 engine beyond factory limits.
Ideal for Porsche 718 Cayman & Boxster owners building:
This upgrade is intended for serious performance applications—not mild bolt-on setups.
Professional engine assembly is required.
Installation involves full engine disassembly and machining as needed.
Custom ECU tuning is mandatory after installation. Supporting modifications such as upgraded fueling, turbocharging, intercooling, and engine management should be planned as part of a complete build strategy.
Always consult with RaggDoll Motorsports prior to purchase to confirm compatibility, power goals, and supporting requirements.
RaggDoll Motorsports specializes in complete Porsche 718 performance ecosystems, from bolt-ons to fully built engines. We don’t just sell internal components—we help design reliable, high-power builds based on real-world experience and testing.
Stronger foundation.
Higher ceiling.
Built to last.
Built differently — because performance demands it.
Liza & most of the time Vince is amazing...lol. Nah, kidding, these guys are awesome folks to deal with. I purchased their Stage 2 turbo, turbo inlet, intercooler, engine tune, and high pressure fuel pump for my 2018 2.5L Boxster GTS and they're products and service have been top notch throughout the entire process.
Raggdoll Motorsports set up two dyno sessions for my Porsche Turbo S. The Porsche touts a 4.0-liter built engine and head work facilitated by Sam at ByDesign. Also has the XR ByDesign turbo kit with all the supporting mods. The first session the PDK kept transitioning out of manual mode. During the second session a boost leak at the throttle body boot ended the session early. We managed 812 hp on a Mustang dyno at only 20 psi of boost.
The people behind RaggDoll Motorsports have been in the game for a very long time and really know their stuff. They have a passion for modifying cars and are enthusiasts before anything else.
I purchased a RENNEN turbocharger for my 718 T. I had a special request, which was to get the turbine housing coated with Swain Tech white lightning thermal barrier coating and RaggDoll accommodated without hesitation even though it was something new for their team.
Hey All! Shout out to Liza and @Raggdolls718. Amazing customer service, product knowledge and a top quality product. Liza went out her way to accommodate my tight timeframe and the level communication and level of detail shared was amazing.
I purchased the Raggdoll Series One turbocharger upgrade and the turbo inlet upgrade from RMS for my Porsche 718 Cayman GTS and was very pleased with both the products and the customer service from RMS!
Engineered for the 718 platform, trusted worldwide. RaggDoll delivers high-performance parts, custom turbo innovations, and expert-level support for Porsche 718 drivers and tuners—from Las Vegas to Germany, Hong Kong, and beyond.
