KTM RC 390 2021-2023 GP-S1 exhaust system
The GP-S1 Exhaust: Mega by name, mega by nature! Engineered with a bold conical design, the GP-S1 produces an unforgettable sound that perfectly complements its striking looks. Whether you're carving through back roads or making a statement in the city, this exhaust guarantees head-turning performance and style.
Proudly made in the UK, the GP-S1 is available in two premium finishes: Brushed Titanium for a timeless, polished look and Ceramic Black for a sleek, modern edge. Built with lightweight, durable materials and precision craftsmanship, it’s designed to enhance both your bike’s performance and aesthetics.
Each GP-S1 comes with a removable baffle, giving you the flexibility to adjust the sound to suit any ride. Combining aggressive design, impeccable quality, and premium finishes, the GP-S1 is the ultimate choice for riders who want their exhaust to deliver in every way.
Full Titanium or stainless steel construction.
Massive weight savings.
Improved performance 1-2bhp. (but additional gains can be made with tune.)
Full fitting instruction supplied.
Retains pillions pegs if required.
Simply bolt on and ride!
No remap required
DB levels tested @ 5500 RPM
- Stock = 97-98 DB's
- GP-S1 = 105 + DB's
Titanium GP-S1 = 0.240 KG
Titanium GP-S1 with mesh = 0.255 KG
1 x GP-S1 slip on exhaust
1 x Full fitting instructions (emailed upon purchase)
1 x Pro-Race official lifetime warranty
Due to the extremely high demand for our products we currently have lead times, We show the realistic lead times for each product on there listing page below the title.
Please note: Your order may be, and in many cases are shipped faster than the lead time stated on the listing but we want you to be aware that every product is hand-made to order solely in our UK factory by us.
Ceramic coating: Please note that adding ceramic coating to your product will add 1 additional week to the dispatch date due to the coating process.
If you have any Questions regarding our lead times please contact us..