Peron 90mm Race down pipe

[DAZMC]

Okay so I have had the peron downpipe on for sometime now its a straight bolt on kit its not to loud when just driving around normal however under load the it sounds nice and deep with good dsg pops the one thing that i wasn't sure about was if was going to drone at all however at 70-80mph its prefect on the motorway


PERON has expanded its development program to cover VAG MQB hardware. We are proud to present our 90mm RACE downpipe package for all Audi, VW and Seat models. Full robotic pulse tig welded, full stainless steel construction including flexible sections and lambda bosses.

 

[Salik Sajid]

90mm is 3.5inch, i have seen mostly 76mm downpipe. Is this 3.5inch all along till end or from the top bending part to 3inch? Wat will be the gain and cost?