For additional cosmetic enhancement You might like to consider BPCC-7156 Exhaust Guard Carbon Ninja ZX-4R(R) which is fully compatible with this slip on conversion. * Please note that decibel killer model EXDK-0003 is compatible but not included with this slip on conversion system. Please add EXDK-0003 to your cart if you wish it to be included in your order. If you need further reason to purchase this product this slip on set is considerably lighter than the stock silencer. Weighing in at only 2kgs compared to OEM at 4.2kg. This system may not comply to specific country noise emission regulations and is not homologated for street use.