Has anyone installed a Nitrous System on there HHR yet?
Senior Member
Joined: 01-13-2006
Posts: 1,059
From: Tucson, AZ
A few guys on Ecotecforum.com and on CobaltSS.net are running 50 and even 75 shot N2O all the time. They run an intake and a 2.25 exhaust and have NO other upgrades. They suggest running 91 octane though. I am purchasing a kit soon from Zex to put on the HHR. Won't use it for another few miles (warranty is almost out) but I used to have N2O on my Prelude and it was definately a LOT of fun. Check those two sites for more info on nitrous though.... www.ecotecforum.com or www.cobaltss.net Both site have 2.4 specific forums along with Nitrous specific forums....
Senior Member
Joined: 01-13-2006
Posts: 1,059
From: Tucson, AZ
Avg kits are around $500... The one I am going to use is a Zex kits and comes with everything for $499.00 at a local shop. It has a control box that has a sensor that reads the TPS voltage and adjusts to ONLY activate at WOT and has the solenoids for fuel and N2O built into the box. VERY nice kit!