For drag racing applications, you need a big turbo to make big power, but along with the big power comes a big problem--turbo lag. These Nitrous Express InstaBOOST EFI nitrous systems have the cure for turbo lag woes. They are uniquely configured to come on strong to eliminate that dreaded turbo lag, but then ramp out the nitrous smoothly to let the mighty turbo do its thing. The end result is monster power with zero lag, even with a huge turbo. The Nitrous Express InstaBOOST EFI nitrous systems feature an adjustable 1-8 psi pressure switch to control the nitrous flow--it's sure to have you out of the hole faster than ever.