-Item Details: This DIY upgrade kit is designed for any Borg Warner S400 turbos with a compressor wheel smaller than 80mm, with this kit you can upgrade your turbo to a billet wheel S480. It comes with a 7+7 blades 80mm billet compressor wheel which the compressor flow is rated at 120 lb/min. If you have a 96*88mm turbine wheel, the capabilities range will be from 750 to 1250 horsepower. The only thing you need to do is to open the pocket for the larger compressor wheel exducer on your bearing housing to a diameter of 114.5mm. You will perfectly upgrade your current S400 turbo to a billet S480. The rebuild kit comes in this DIY kit and has a 360-degree CNC machined brass thrust bearing, it helps the turbo to handle more thrust force for better durability. The staggered step gap seal rings will reduce the oil blow-by of the seals. -Special Note: 1. Please double-check your sizing prior to purchase. 2. Professional installation is highly recommended! Please ask all questions prior to purchase! 3. Highly recommend getting the CHRA VSR balanced after the rebuild (is required for warranty purposes)! 4. No step-by-step instructions!5. Please note that individual components, rebuild kits, and upgrade kits are not covered by the warranty ONCE INSTALLED. This is due to our inability to determine the pre-existing condition of the turbocharger before the rebuild or installation process, as well as our inability to guarantee proper re-balancing and assembly of the turbochargers.