Sport or QRS??

[dslider]

Hello, I can't decide between a Sport series or QRS for my 2004 DS650X.
I would love maximum power and torque increase, but I've read that the sport series is way too loud. Could Mike or someone tell me exactly what is the difference in sound (db) between both, and also the diff. in power output. (is there a hp-torque graph for this systems for the DS?)
If the diff in power is not noticeable, I will go with the QRS.
If the diff in noise is not noticeable, I'll go with sports

thanks

Cesar

[Mike/HMF]

I run the QRS on my 05' z-400 and at idle you can't even tell the difference between that and stock, but when you rev it and ride it has a great sound that runs at 100dbs. where the sport series runs at 105dbs. so it is slightly quieter. The best part is there was virtually no difference in power between the sport and QRS, that is the best part. If you need to be quieter I would get the sport series with the quiet core option, it runs about 96-97dbs with the quiet core installed but you do lose a little top end power by cutting down the sound, that is the only draw back. Hope that helps.
Mike/HMF