{"product_id":"sc-project-a23a-ac90","title":"SC-Project SC1-R 2-1 Full Exhaust System in Stainless Steel for Aprilia RS 660 (2020-2024) A23A-KC90","description":"\u003cp\u003eBorn on the dyno and refined on the track, the SC-Project SC1-R 2-1 full exhaust system for the Aprilia RS 660 is the direct result of SC-Project's collaboration with Aprilia Racing on the RS 660 Trofeo championship. This is not a road compromise — it is a purpose-built racing system that removes the catalytic converter, eliminates unnecessary mass, and liberates the parallel-twin to perform exactly as the engineers intended at the limit.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFull 2-1 system engineered for the Aprilia Racing Trofeo RS 660, delivering optimised torque and peak power across the rev range\u003c\/li\u003e\n\u003cli\u003eHeader pipes fabricated from AISI 304 stainless steel with CNC-machined couplings for a precision, rattle-free fit\u003c\/li\u003e\n\u003cli\u003eT.I.G. welded throughout for race-grade strength and a clean, motorsport aesthetic\u003c\/li\u003e\n\u003cli\u003eCatalytic converter removal reduces operating temperature and unlocks additional power\u003c\/li\u003e\n\u003cli\u003eSC1-R slip-on silencer available in carbon fibre or titanium — both chosen for maximum weight saving and race-day looks\u003c\/li\u003e\n\u003cli\u003eCarbon fibre end cap and dedicated carbon heat shield included as standard\u003c\/li\u003e\n\u003cli\u003eLambda sensor port retained for ECU compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTrack Performance\u003c\/h2\u003e\u003cp\u003eThe SC-Project SC1-R system trims a verified 2 kg from the stock exhaust weight, dropping from the factory figure of 6.4 kg to 4.4 kg. On a 660 cc machine where every kilogram of unsprung and centralised mass matters, that reduction translates directly into sharper turn-in, faster direction changes and reduced stress on the chassis between corner sequences. The optimised 2-1 collector geometry promotes a broader torque spread, keeping the parallel-twin pulling hard from the mid-range and carrying that energy through to the top of the rev range where race lap times are decided.\u003c\/p\u003e\u003ch2\u003eBuild Quality\u003c\/h2\u003e\u003cp\u003eSC-Project manufactures this system to the same standards applied to its MotoGP and WorldSBK programmes. Every header joint is TIG welded by hand, the CNC-machined stainless couplings guarantee a gas-tight seal that survives repeated heat cycles, and the carbon fibre heat shield is bonded and finished to a standard that stands up to scrutineering. The anodised aluminium single-seat exhaust bracket is included and engineered to clear the pillion footpeg hangers without modification, keeping installation time to a minimum.\u003c\/p\u003e\u003ch2\u003eFitment and Compatibility\u003c\/h2\u003e\u003cp\u003eThis system is a direct, plug-and-play fit for the Aprilia RS 660 covering model years 2020 to 2024. It is compatible with the original pillion footrests. This system is for racing use only — it does not carry road-legal homologation and must not be used on public roads.\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eAttribute\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem type\u003c\/td\u003e\n\u003ctd\u003eFull system 2-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeader material\u003c\/td\u003e\n\u003ctd\u003eStainless steel AISI 304\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSilencer material\u003c\/td\u003e\n\u003ctd\u003eCarbon fibre or titanium (variant dependent)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnd cap material\u003c\/td\u003e\n\u003ctd\u003eCarbon fibre\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight saving\u003c\/td\u003e\n\u003ctd\u003e-2 kg (stock 6.4 kg \/ SC-Project 4.4 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLambda sensor\u003c\/td\u003e\n\u003ctd\u003eYes — port included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoad legal\u003c\/td\u003e\n\u003ctd\u003eNo — racing use only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eAprilia RS 660 (2020-2024)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart numbers\u003c\/td\u003e\n\u003ctd\u003eA23A-AC90C (Carbon) \/ A23A-AC90T (Titanium)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"SC-Project","offers":[{"title":"Carbon","offer_id":53167253160202,"sku":"A23A-KC90C","price":0.0,"currency_code":"EUR","in_stock":false},{"title":"Titanium","offer_id":53167253192970,"sku":"A23A-KC90T","price":0.0,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/A23A-AC90.png?v=1780794291","url":"https:\/\/inter-pace.com\/nl\/products\/sc-project-a23a-ac90","provider":"Inter-Pace","version":"1.0","type":"link"}