New SiR R900 Turbo Upgrade for Nissan R35 GT-R 700-900+ Wheel Horsepower on E85 – OEM-like spool with ball-bearing smoothness and reliability. 

The SiR R900 is the perfect turbo upgrade for 2009+ Nissan GT-R owners chasing serious power while keeping daily drivability. Optimized aerodynamics and billet compressor wheels deliver 700-850+ WHP at sea level on E85 with stock engine + supporting mods.

Why R35 owners choose the SiR R900:

• Billet 50mm compressor wheels – rated for 45 lb/min each
• Dual ball bearing CHRA – smoother power delivery and earlier boost than OEM
• Billet 1-bar wastegate actuators with O-ring seals
• Uses your OEM oil & water lines – true bolt-on ease
• Spools only 200-300 RPM slower than stock but builds boost earlier thanks to ball bearings

Real-World Performance (customer dynos):

• 770 whp @ 21 psi (1.5 bar) – typical setup with OEM 2012+ inlets, upgraded intercooler & exhaust
• 885 whp / 640 wtq @ 26 psi (1.8 bar) – with upgraded inlet pipes, intercooler & exhaust

What’s Included:

• Pair of SiR R900 turbos
• Billet actuators & hardware
• Optional 63mm inlet pipes (select variant)

Requirements & Notes:

• For 800+ WHP: Larger than 2012+ OEM inlets required
• $1,500 refundable core fee (or send your OEM turbos)
• 2-3 week lead time
• Built for Gasoline + E85 on OEM R35 engine with proper supporting mods

Ready to transform your GT-R? Add to cart and join the SprayItRacing family of record-holding R35 builds.