Hi, thankfully ours aren't over £400. We have a Value Kit offered to forum members for £115 inc. Vat AND DELIVERY, unlike most Ebay type units this kit is digital, controlled by micro-processor and programmed with a map. This unit will not cause over-fuelling at idle or any of the other nasties you get with cheap analogue units.
This kit used to sell for nearly £300 but the company who manufactures for me has compacted the PCB board down and used a plastic instead of alluminium casing to reduce cost and make the price very competitive.
The more expensive kit we sell is £349 (Premium Kit) and has connections to both fuel rail and turbo, it would only be needed on cars with DPF (Diesel Particulate Filter) so you will most likely be ok to use the Value kit. Ours gives around the same 15-17 BHP and 35NM which sounds small but as a perecentage of the cars original power it's actually about a 20% increase which you will definately notice.
This kit as with all the tuning kits we sell comes with 30 day money back guarantee if your not 100% happy and 3 years product warranty.
PM or email me at
[email protected] if you have any questions.
Cheers
Daron