Performance Improvements is your source for Astra/Hammond from Willpak Industries in Canada! Aftermarket accessories including Car, Truck and Van Rear Window Louvers, Side Window Louvers, Side Window Scoops, Hood Scoops, Chin Spoilers, Rear Quarter Scoops, Tire Covers, and other molded products for your car.Canadian pricing, no customs, duties, or border fees, 365 day return. Don't see what you're looking for? Visit one of our locations or give us a call toll free 1-877-471-6700. Family-owned and proudly Canadian since 1964!