Bolt on turbo kit for the 2000-2002 Audi S4 capable of producing over 605hp with supporting modifications. Available with or without inlet pipes for budget minded enthusiasts
Installation Instructions:

Bolt on turbo kit for the 2000-2002 Audi S4 capable of over 770hp with supporting modifications. If hunting down Enzo's, ZR1's and Zonda's is what's on your mind, this is the kit for you.
Installation Instructions:

Bolt on turbo kit for the 993 and 996 Porsche Twin Turbo. These units offer better low end and midrange (how does 630wtq @ 3500 RPM sound) than comparable upgrades with the potential of 800+ hp to the wheels.
Installation Instructions for 996:
(25mb)

Bolt on turbo kit for the 993 and 996 Porsche Twin Turbo. Two variants of this turbo are offered, the 3071R and 3076R, both offer huge hp potential (between 900 and 1000+ hp) but maintain daily drivability.
Installation Instructions for 996:
(25mb)