The Stealth 64 is the one of the best in-class turbo upgrades for the LMM engine platform. Designed to be a no-compromise solution for performance trucks needing 650rwhp, those looking to perform some serious towing, generate snappier response times, and gain better EGT control are in for a treat. The stock LBZ/LLY engine runs out of air at about 530rwhp and LMM at about 570rwhp, in turn leaving out higher leagues of performance. It can be difficult to control EGTs on extended pulls past 400HP, however the Stealth 64 improves upon these weaknesses with a specially designed billet compressor blade and turbine wheel matched together. This match represents the best compromise between quick spool-up response and overall compressor flow.