Hi JLS22!
Just in case it helps, below are the main differences between pre & facelift models, if you decide to go the facelift route, think about an early sensibly priced (a lot are still over priced so be careful) C4S, if possible, for best residuals!
2002 MY-
New "˜Facelift' model introduced, also the C4S & TARGA models.
The facelift (& new model C4S & Targa) featured a number of improvements, including"¦
1/
A more aggressive looking front and rear-end, with aero-dynamic improvements that greatly reduce lift, along with new (more efficient) clear teardrop shaped front lights (same look as the Turbo) to further distance the 911 from the Boxster.
2/
Porsches "Variocam plus" technology was added to an enlarged 3.6 litre engine. This
gave an additional 20bhp (to 320 bhp) but more importantly, greatly increased the mid
range flexibility of the car. In-gear thrust felt better and more deep chested than before.
3/
The exhaust system was "˜tweaked' to improve the volume and quality of sound
inside and outside the car.
4/
Inside the 996 gained a glove box & twin cup holders, the interior was upgraded to
include soft touch plastics.
5/
The OBC (on board computer) became standard equipment & this was placed centrally below the rev counter, the digital speedometer became smaller and moved (this was a negative step) to the left.
6
/ A "˜smaller' three-spoke "˜sports style' steering wheel became standard equipment.
7
/ The facelift also incorporated improvements to aerodynamics, crash protection, body shell rigidity & benefited from chassis/suspension fine-tuning, to improve stability, handling & ride comfort.
These M.Y. changes are the main ones, but there were other tweaks (upgraded engine management, chassis, tyre widths etc.) over the years.
The above list applies to C2/Cab & C4.
All the best with your search.
Grant