Gravity Exhaust Systems are designed and manufactured to enhance the sound, appearance and most importantly, the performance of your vehicle. All systems are designed in house using the OEM mounting points to ensure smooth fitment every time. ---2.5" Bore Throughout with a 3.5" Tailpipe! ---A free flowing exhaust is a great way to get the best out of the 1.8L engine ---Fits from the catalytic converter back ---Manufactured from Mandrel bent T304 grade stainless steel and CNC machined Flanges with full TIG welding for strength and durability ---Engineered to improve throttle response and increased power and torque across the entire RPM range Fitment: ---Mazda MX5 MK2.5 NB 1.8L 2001-2005 models Please Note: This System is only suitable for the 110/146bhp manual models.