SPOOL UP IS COMPARABLE TO STOCK, while raising airflow significantly. Customers are amazed at the spool up, and driveability. While most twin setups are sluggish off the line, due to incorrectly sized turbos, this kit uses a very quick spooling D-Tech primary (very similar to HTB2 & Phat Shaft Turbos, but modified especially to be very fast spooling), to produce boost right off idle. Then a large volume HT3B comes in to produce all of the airflow you'll need. EGT's are typically reduced by 300-600 degrees, over a single turbocharger. Making towing with these Twins a dream. At 55-60 psi boost, drive pressure (exhaust) is 50-52 psi, imagine how easily your engine is breathing. This can't be done with a single turbocharger (with single turbos, typically drive pressure is nearly double boost pressure). Horsepower, and torque are increased throughout the entire RPM band, and significantly increased in mid and upper range. Direct bolt-on application, no cutting or fabrication needed. Uses only the stock oil return (no need to pop out freeze plug for the second return line), all oil returns in the single, stock block return line. Bolts directly up to the stock exhaust The absolute largest air filter on the market. Air tubing is silicone with Kevlar liner, you don't have to fight to the a steel air lines. Tubes are sticky so they don't blow off under pressure. D-Tech Turbocharger with a 35% greater wategate capacity, Polished Compressor Housing on Top Turbo, and Adjustable boost pressure. Head studs are highly recommended for boost pressure over 45 psi, and fire rings recommended for boost pressure over 60 psi. This system is capable of well over 60 psi, but is adjustable to below 60 psi, depending on truck. Kit includes: Air Filter, Cast Iron Elbow (carries exhaust from primary to secondary turbo), 3-Piece Manifold, 2 Rubber Inlet Air Tubes (reinforced with steel to prevent collapsing), 2 Silicone/Kevlar Tubes, 1-D-Tech Turbo (primary), 1-BHT3B Turbo (secondary), 2-Steel Braided High Temp Oil Supply Lines, 2-Steel Drain Lines, Turbo Gaskets, Oil Line Adapters, Mounting Bolts, Exhaust Adapter (from BHT3B to exhaust pipe), V-Band Clamps, High Torque T-Bolt Clamps, Low Torque Clamps, Installation Instructions. 1-Year Warranty. FREE shipping!