What performance increase over std would this be?

[roosevelt]

Spotted this on AutoTrader;

2002 VOLKSWAGEN GOLF 2.8 V6 4MOTION 5dr Hatchback, 62k miles Manual MURANO RED Petrol Hatchback 2792 cc. Manual, 62,000 miles, Due to being made redundant, my pride and joy has to go. Stunning example of this rare model in the Golf range. No expense has been spared with the maintenance or modifications on this car. 2002/02 V6 4motion in rare Murano Red Pearl, 62K, Full VW Warranty/Roadside Assistance till October, Tax till November, MOT till October and has Full VW Service History (and has just been serviced - 09/04/08). Spec includes: Xenons(with auto levelling), Auto Rain Sensitive Wipers, Cruise Control, Auto Dimming Rear View Mirror, 6 Speed Manual Gearbox, Climate Control, Electric Windows, Electric Heated Mirrors, PAS, ABS, ESP, etc.
Performance Modifications: Jabbasport Custom Remap, Milltek CAT Back Stainless Exhaust, K&N Panel Filter in R32 DSG Airbox.
Chassis Modifications: 8x18 BBS RCs with Falken FK452 tyres, Brembo BBK with 330mm 2 Piece Discs, Koni FSD shocks, Eibach Prokit, H&R Anti Roll Bars, Poly Wishbone/Dog Mount Bushes.
Interior Modifications: Complete R32 Interior including Doorcards, Complete R32 Aluminium Interior Trim, R32 Pedal Set, W8 Light, Bora Vents, Tinted Windows.
Exterior Modifications: R32 Roof Spoiler, Genuine Anni Front Valance, R32 Mirrors, Colour Coded Rear Valance, Sharan VW Badge. As you can see, this car really has had the best modifications carried out and is stunning.
Drives and sounds superb. Private Plate not included.

[Fourmotion]

I would think the if the remap was done at the same time as the exhaust then 15-20 bhp may have been yielded. The airbox and filter would only give 1 or 2. I've probably over estimated those as well.

The only efficient way to get substantially more power is forced induction.

[Ranger 6]

Have a look on uk-mkivs.net - it might be one of theirs.

[steebo888]

I used to have a 4 motion and remember that a remap from amd was said to be about 10bhp increase so with the exhaust and filter i would also say about 15bhp total.
With it being natrually aspirated theres not much bhp increase unless you spend loads so i would say the gti 1.8t is better for modding and its a heck of a lot cheaper to run as i was getting about 22mpg normal driving.
Also the 4 motion is very heavy at the front so understeers alot.