AMS Perfomance Uk M3 / M4 Downpipes 
 
The downpipes are made of T-304 stainless steel unlike all other cheap ones out there.
 
Will fit the following models:
 
BMW M3 F80
BMW M4 F82
 
Some advantages of our Decat pipe:
 
Better throttle response.
Relief of the turbocharger due to lower temperature and less exhaust back pressure. 
The cylinder charge is increased, which improves performance.
 
Car feels a lot more free and responsive with this installed and has increased power by 15-20 BHP on test vehicles.