maff and cats

[VNSS90]

hey all just a quick question bout a mafless tune and cats. i have hsv extractors and stock cats i think lol with a lukey 2 and a half cat back just wondering if i got a mafless would i need to get hi flo cats or could i just get a tune and get some hi flos later on? cheers

[Jamiejamie]

If you get a maffless you have to get a tune. You don't need high flow cats for maffless, good to have though.

[Not_An_Abba_Fan]

The combination of a mafless tune and high flow cats will make the exhaust note louder and crisper. As above, you don't necessarily need high flow cats, but if you are after a higher dyno readout, then you definitely need them. If you don't care about a piece of paper then they are absolutely necessary, unless you want it louder.

[VNSS90]

cheers for the info so if iget a maffless with standard cats do i have to get a retune for hi flos?