Zex
Zex is one of the most respected names in the business simply for its cut-no-corners approach to building nitrous kits. As a subsidiary of COMP Cams, this type of quality is to be expected along with plenty of cross-pollination. Such is the case with the production of the LSX intake manifold by sister company F.A.S.T.The LSX Direct Port kit was designed with the LSX's established nitrous ports and burst panels in mind, and when assembled is a work of art. However, the kit works perfectly well with the stock intake or other aftermarket intakes. Zex uses its own patented nozzles for optimum atomization, and throttle position sensor technology for wide-open throttle activation. There is also a built in sensor for detecting bottle pressure, which adds or subtracts enrichment fuel for maximum performance and safety. The kit is totally complete with everything you need down to the wire ties and custom-made flex lines for a professional looking install. Zex also makes plenty of other wet- and dry-nozzle kits to suit your nitrous needs.
Company: Zex
Applications: LS1/LS6
Type: Direct Port
Base Kit: 10-pound bottle, long and short bottle bracket, fuel and nitrous solenoids, two solenoid brackets, 18-foot -4AN stainless steel braded hose, 3-foot -4AN stainless steel braided hose, four 2-foot -3 hoses, twelve 7.5-inch -3 hoses, four 11-inch -3 hoses, -4AN to 1/4-inch NPT filter fitting, -4AN to 1/8-inch NPT fitting, TPS activation switch, eight direct-port nitrous nozzles, two distribution blocks, arming switch, 1/8-27 NPT tap, jets (.017, .019, .021, .028, .030, .038, .040, .043, .052, .056, .067, .105)
Power Range: 75-250 hp
Price: $1,593.33
Other Kits: LS1 Wet (75-125 hp), LT1 Dry (75-125 hp), Universal Race EFI system (100-250 hp), Universal Dry and Wet kits for four-, six- and eight-cylinder motors
Texas Nitrous Technology
TNT is another up-and-coming nitrous company with an outstanding reputation and big popularity among the F-body crowd. Founded by the Texas company Specialty Motorsports, TNT was created to develop race-car quality nitrous systems at competitive prices. TNT systems are designed to run more on the rich side, in order to reduce cylinder temperature and preserve the motor.
The use of the patented Gas Blaster nozzles and spray bars allow a slightly richer condition while still promoting optimal atomization due to the nozzle's unique design. Both the LS1 and LT1 wet kits employ dual nozzles for more even distribution and a better spray pattern, which will ultimately be easier on the motor. The nozzles are mounted into a custom billet aluminum plate that bolts right up to the LT1 throttle body. Since LS1s have a single throttle body, an aluminum ring is used with an O-ring and set screw to hold it to the throttle body, while the factory or aftermarket bellows slip over the other end. Both kits are available in a 150-250-rwhp version with larger nitrous and fuel lines, fittings, a bottle valve, solenoids, and jets. However, TNT recommends those running 150hp shots and over upgrade to a high-flow fuel pump, forged rods and pistons, and detuning by two degrees of timing for every 100 hp. An MSD window switch is also highly recommended for all users, and most other safety devices are already included in the kit.
Company: TNT
Applications: LT1
Type: Wet
Base Kit: 10-pound bottle, CNC billet aluminum plate, two stainless steel nozzles pre-mounted in plate, four 12-inch -3AN lines, fuel and nitrous solenoids with fittings installed, one in-line nitrous filter fitting mounted in nitrous solenoid, 18-inch -4AN fuel supply line, 12 laser-marked jets (75, 100, 150 hp), 17-foot nitrous bottle supply line, stainless steel -6AN bottle nut, bottle nut washer, NHRA stainless steel blow-down tube, NHRA blow-off cap, liquid nitrous pressure gauge pre-mounted in the bottle, stainless steel bottle brackets, WOT micro switch, arming switch, heavy-duty 40-amp relay, four throttle-body extension bolts, five 8-foot 14-gauge electrical wires, assorted spade ring and butt terminals, throttle extension brackets (all lines are Teflon-coated braided stainless steel)
Power Range: 75-150 rwhp
Price: $754
Other Kits: LS1 wet kit (75-150 rwhp) or (150-250 rwhp), LT1 (100-250 hp), Universal F1 wet (50-150 hp), Wet EFI (50-100 hp) and Dry EFI kit (50-100 hp), Pro Dry Nozzle System (300-600 hp) Ultimate Nozzle System (300-600 hp)