What car mod gave you the biggest smile?

[Jeroen]

Wondering... what modification have you done to your car, any car, that gave you the biggest smile in the world?

For me, undoubtedly that was with my Talbot Samba Rallye Group B to street conversion. When doing the conversion we found that the stock airbox was a snug fit so we put it on and I drove, with loads of fun, for a couple of weeks. Then I decided to remove the airbox just out of curiosity. Man how that transformed the car! Tons of extra torque with the trumpets out in the open and above all, what an amazing howl from those twin Webers! Almost deafening, but with performance to match.

In BMW land there are also some really simple mods that can cause big time improvements I guess. In looks, or in handling for example. A front strut brace is fitted within minutes but might be one of the best handling improvements you can book.

[Duracel79]

S54

[costask2]

First smile on my e21 was when I bought it, second smile which was bigger was when I fitted the BBS 16:s, third smile even bigger was after the instalation of the s14 and now I´m waiting for the suspension to lower it to max and then I will probably never loose my smile every time I will see the car. ...

[nas80]

has to be 100% extra power from 24v

[dannyboy]

my m30 3.5 conversion, full bore, 5000rpm, drop the clucth 2nd gear take offs .... e39 m5,e46 m3, scoobys and a few bikes.. got a bit of a shock

[croma_man]

volvo 850 T5 estate, TD04-HL18T turbo, 3" downpipe and full exhaust, and 1.2bar boost...100-200 round 8s.

wheelspin 2nd gear anytime, anyplace. The best thing was demotivating some rich kids with new audi's and bmw's on the highway.

[petroscf]

Last couple of years I get big smiles from my recent mods! Weber, strut bar and Alfa front calipers with vented discs!
So I can't imagine, how big will the smile become if/when I change the engine for a more powerful one!!
(A couple of some more interior mainly but not that big smile worth mentioning here)...