2026 Aprilia RS660 / Tuono 660 Ported Engine Head – Stage A / Stage B
Upgrade your Aprilia 660 engine with a fully reworked and performance-oriented cylinder head, developed for riders looking for massive plug&play horsepower gains without the need of a full engine build.
This is a brand new engine head, fully machined and assembled, designed to be installed as a plug & play solution on all RS660 and Tuono 660 (2021 to present).
Key Features
Fully ported cylinder head for improved airflow and performance
Intake ports epoxy-filled and CNC machined
Exhaust ports hand-ported and optimized
Valve seats reworked, adjusted and throated
PAIR system struts milled/removed (weight reduction -220g and improved engine bay accessibility)
"Gabro Racing" logo engraved
Supplied assembled with all new parts (valves, springs, retainers, seals)
Stock head height (can be machined to increase compression ratio if desired)
Available Configurations
Stage A – Fully ported head - Stock Valves Setup
OEM valves and springs
Power gain: approx. +3 to +6 HP over stock
Ideal for track-race performance when valve size can’t be modified
Stage B – Fully ported head - Oversized exhaust Valves
Oversized 27mm Nimonic exhaust valves
Upgraded high-performance exhaust spring kit
Seats and ports fully optimized for this configuration
Additional +3 to +5 HP over Stage A
Total gain: up to +10 HP vs stock engine
Designed for highest-performance on open rules
Compatibility
Aprilia RS660 (2021 to present)
Aprilia Tuono 660 (2021 to present)
Important Notes
Production time: heads are finalized (exhaust porting) after order confirmation – delivery time approx. 2–3 weeks
This is not a complete head assembly: cams, lifter buckets and additional components must be reused from your original engine
Compression ratio: supplied at stock height – optional machining required for higher compression setups
Why Choose This Upgrade
Increase horsepower just fitting a ported head
Professional-level porting and machining
Plug & play solution for serious performance gains
Perfect base for advanced engine builds (HC pistons, cams, rods and so on)
2026 Aprilia RS660 / Tuono 660 Ported Engine Head – Stage A / Stage B
