Want to modify or upgrade your 99-00 Honda Civic Si (EM1) with aftermarket nitrous systems? At ClubCivic.com we have a great selection of aftermarket performance parts for your 6th generation Honda Civic Si. We have 9 Nitrous Systems available in our catalog and most have free shipping.
Nitrous Express Nitrous Oxide Kits
 20923-00
Nitrous Express All Sport Compact EFI Single Nozzle Nitrous Kit (35-50-75HP) w/o Bottle 1999-2000 Honda Civic Si |
 20923-05
Nitrous Express All Sport Compact EFI Single Nozzle Nitrous Kit (35-50-75HP) w/5lb Bottle 1999-2000 Honda Civic Si |
 20923-10
Nitrous Express All Sport Compact EFI Single Nozzle Nitrous Kit (35-50-75HP) w/10lb Bottle 1999-2000 Honda Civic Si |
 20923-12
Nitrous Express All Sport Compact EFI Single Nozzle Nitrous Kit w/Composite Bottle 1999-2000 Honda Civic Si |
 20923-15
Nitrous Express All Sport Compact EFI Single Nozzle Nitrous Kit (35-50-75 HP) w/15lb Bottle 1999-2000 Honda Civic Si |
 20927-00
Nitrous Express Sport Compact EFI Dual Stage Nitrous Kit (35-75 x 2) w/o Bottle 1999-2000 Honda Civic Si |
 20927-10
Nitrous Express Sport Compact EFI Dual Stage Nitrous Kit (35-75 x 2) x 2 w/10lb Bottle 1999-2000 Honda Civic Si |
 20927-12
Nitrous Express Sport Compact EFI Dual Stage Nitrous Kit (35-75HP x 2) w/Composite Bottle 1999-2000 Honda Civic Si |
 20927-15
Nitrous Express Sport Compact EFI Dual Stage Nitrous Kit (35-75 x 2) w/15lb Bottle 1999-2000 Honda Civic Si |