Superb Customer Service - Premium Quality - Low Price. We are proud to say that our products have a 10-15% increased performance compared to OEM products. All the parts are manufactured under strict quality control standards using the highest-grade materials imported from German. The products are direct replacement and 100% factory tested. Very often there is more than one part available per application as auto makers often switch midyear.We provide part numbers and high resolution photos, but if you do not check them we cannot guarantee fitment. We're confident in the product we sell. We do not offer exchanges.