There are two different options when upgrading to Pure Stage 2 Turbos for the F80 M3 and F82 & F83 M4 S55: Fast Spool (Spools like stock turbos, capable of 600+whp), and HiFlow (300-500rpm spool difference, capable of 700+whp).
This turbo upgrade is intended for those looking to hit big power goals while maintaining the stealth OE look under the hood. BMW M3/M4 S55 Pure Upgrade Turbos. The only true turbo upgrade set available for these cars. Upgraded billet compressor wheel, upgraded turbine wheel, heavy duty large pad upgrade thrust, and completely CNC machined.
In 2014, Pure Turbos bought a M4 and immediately began R&D to create what is known as the most powerful and refined turbo upgrade offering available today.
Pure dyno tested at 632whp in 2014 and have since tweaked and tuned the turbos to unleash over 700whp!
These S55 upgrade turbos are the only available to offer a turbo utilizing purpose built S55 compressor and turbine wheel profiles.They are simply the only proven powerful and reliable turbo upgrade available for your M3 or M4.