10/06/2026
🚀🇬🇧STAGE 4Plus Tuning Project
🔬Smart ForTwo 451
▪️3B21 Mitsubishi Turbo Engine
▪️3 Cylinder-999cc-12Valves
➡️Stage 4Plus 260HP Tuning Project
➡️Fuel ⛽️ Ron 100 & Methanol Kit 🚿
👉☝️Another international 🌎 project completed by Smart HarD TuNinG 🇬🇷
This Smart Fortwo 451 Turbo from the UK 🇬🇧 returned to our workshop after previously receiving our Stage 3 Turbo Engine Package.
Following a full season of use, the owner decided to take the next step and upgrade to our complete Stage 4Plus specification.
This project is another example of the advanced Mitsubishi 3B21 performance packages developed and assembled by Smart HarD TuNinG🇬🇷
🦍Presentation STAGE 4 Plus 💎
➡️ENGINE BLOCK▪️
Full forged engine build
✅Closed-deck block conversion
✅CP Forged Pistons 72.25mm
✅Forged Connecting Rods
✅Tri-Metal Performance Bearings
✅Precision Crankshaft Balancing
➡️CYLINDER HEAD ▪️– STAGE 4Plus 💎
✅Full Porting & Flow Development
✅Oversized Ferrea Intake Valves
✅Beryllium Intake Valve Seats
✅Bronze Valve Guides
✅New TRW Exhaust Valves
✅Performance Valve Stem Seals
✅Titanium Retainers
✅Stage 2 Valve Springs
✅Stage 2 Reprofiled Camshafts
➡️ENGINE ASSEMBLY ▪️💎
✅Performance Thermal-Coated Metal Head Gasket
✅Complete Timing Chain Kit
✅ARP Head Stud Performance
➡️AIR & TURBO SYSTEM ▪️💨🌪️💎
✅Stage 5 Anti-Surge Hybrid Turbo TUFD025
✅Race Specification Intake System
✅Aluminium Intake Pipe
✅High Flow Performance Air Filter
➡️DRIVETRAIN & ELECTRONICS ▪️⚙️ ⚡️ 💎
✅Torsen Limited Slip Differential
✅CAN-Bus iBus Controller
✅Full Version Methanol Controller Kit
👏👏A special thank you to our customer for the continued trust our company
We wish him many safe and enjoyable miles with his upgraded Smart Fortwo 451 and every success with his new little rocket.
Enjoy it in good health, and thank you for being part of the Smart HarD TuNinG family.
Chris Pearson 💪💪
Built in Greece🇬🇷
Driven in the United Kingdom🇬🇧
Smart HarD TuNinG🇬🇷 – S.H.T Performance🇬🇷