CTS Turbo Audi S4 / S5 3.0 TFSI Supercharger Pulley Kit
 
CTS pulley is smaller diameter than stock. Stock pulley size is 63.25, the CTS pulley is 57.3mm; it will increase the speed at which the supercharger spins and will increase the boost pressure output.  Increased boost pressure in conjunction with upgraded ECU software results in a dramatic increase in horsepower and torque throughout the entire powerband. This will not increase stress or excessive wear on supercharger or engine components.

NOTE: 
CTS Supercharger Pulley Upgrade Kit must be used with appropriate “Stage 2” performance software. Stage 2 performance software (not included) will allow you to achieve maximum boost and power from your 3.0T S/C engine while safely optimizing air fuel ratios, timing, and boost pressure bleed off.
 
Most stage 2 software is compatible with this kit. Contact your tuner for compatibility.

Stock pulley size: 63.20mm
CTS pulley size: 57.30mm
 
Product Details
Made in house at CTS Turbo in Canada
Precision CNC machined from billet ASI303 stainless steel – best on the market! No other pulley manufacturer uses this steel.
OEM-spec honing and tolerances
Boost increased from stock 11psi to 15psi, boost holds steady all the way up to redline
Nitride coated for long-lasting OEM looking finish
Includes belt required for install
Stock Size: 63.25mm, CTS Size: 57.3mm
 
Optional Equipment
CTS B8 3.0T Supercharger Pulley Removal Kit
 
Fitment on vehicles with press-on style pulley:
B8/B8.5 Audi S4, S5, Q5, SQ5 with 3.0T SUPERCHARGED engine (before 2016)
C7/C7.5 Audi A6, A7 with 3.0T SUPERCHARGED engine (before 2016)
Audi Q7 with 3.0T SUPERCHARGED engine (before 2016)

- Doesn't fit 4 bolts pulleys -
Audi S4 B8 3.0 TFSI
Audi S5 B8 3.0 TFSI