The EVP Can Am Maverick X3 Secondary Clutch Springs are designed to work with both stock, aftermarket and EVP Shift-Tek helixes.
The rate of this spring is higher than stock in both in torsion and compression.
This spring is for high horsepower vehicles (275+ HP) and will generally raise your operating rpms over the OEM spring, but will apply more sideload to the belt for better grip.
They can be purchased separately or as part of our Shift-Tek line of clutching products. 
Purple = Medium torsional and compression rate