Yup I have the QS and this adapter, it helps with the deep engine braking drone and when cruising at a constant speed its a tad quieter, you remove the spark arrestor screen and then it slides in and you cn reinstall the screen and tip.
I do believe you have to install the spark arrest to get a good tight fit.
Shop for Exhaust, like HMF Racing Quiet Core Insert at Rocky Mountain ATV/MC. We have the best prices on dirt bike, atv and motorcycle parts, apparel and accessories and offer excellent customer service.
www.rockymountainatvmc.com
The HMF Quiet Core is an insert made of 201 Stainless Steel and installs on most HMF exhausts in seconds. It's designed for sound sensitive riding areas and decreases the sound level approximately 3-6dB. Quiet Core Insert Fits:- Performance Series- Titan Series Does Not Fit:- Competition...
www.hmfracing.com