That "Golf Tee" mod is piffle!Originally Posted by Peter-E36
All it does is fool the exhaust in to thinking the engine is warm all the time.
The flap that you are keeping open all the time opens anyway when the engine gets up to normal running temp.
There is absolutley no comparison to a silencer upgrade.
Here's a link to a performance exhaust in Germany.
They ship to the UK regularly. Well known on UK forums. Very competitive price.
http://www.ebay.de/itm/BMW-Performance-Endschalldampfer-Auspuff-3er-E90-E91-335i-/281650484904?pt=LH_DefaultDomain_77&hash=item4193a d56a8