air filter/exhaust mods

Looking at putting on the usual air filter and exhaust. Any filter or exhaust most suited to my 2.2 vectra? :?

k+n panel filter are ok

magnex exhaust's are good, so are Janspeed

I had a custom exhaust fitted at Longlife in Leeds for £380 Excellent buy,

I also have a cheap Apiro Induction filter which is probably the best,
most effective filter ive ever bought.

i got a k & n panel filter with 3 pipe mod

also had a custom longlife cat back exhaust fitted.

Longlife Stainless Steel Cat-Back system and a K&N Panel filter. Do the 3-pipe mod too.