You want proof?

Citroen
1.4l 16v +5 bhp £293.75
2.0l HPi +8 bhp £293.75
Xsara 2.0l +10 bhp £293.75
1.4 VTR +5 bhp £293.75
Saxo (inc VTR/VTS) +8 bhp £293.75

Ford
Focus ST170 +8 bhp £299.00
Fiesta 1.2 <2002 +3 bhp £293.75
Fiesta Zetec S <2002 +8 bhp £293.75
Fiesta 1.25 <2002 +6 bhp £293.75
Fiesta 1.25 16v <2002 +6 bhp £293.75
Fiesta 1.3 <2002 +4 bhp £293.75
Fiesta 1.4 16v Zetec <2002 +5 bhp £293.75
Fiesta 1.4 16v <2002 +5 bhp £293.75
Mondeo 1.6 <2001 +8 bhp £293.75
Mondeo 2.5 (ST24/ST200) <2001 +12 bhp £293.75
Mondeo 1.8 <2001 +8 bhp £293.75
Mondeo 2.0 <2001 +10 bhp £293.75
Transit 2.0 +12 bhp £293.75
Ka 1.3 +3 bhp £293.75
Focus 1.4 +7 bhp £293.75
Focus 1.6 +8 bhp £293.75
Puma 1.4/1.7 +5/8 bhp £293.75
Focus 1.8 Zetec +10 bhp £293.75
Focus 2.0L +10 bhp £293.75
Escort 1.4 +5 bhp £293.75
Escort 1.6 Zetec/1.8 Zetec/1.8 16V +7 bhp £293.75
Explorer +8 bhp £293.75
Fiesta XR2/Escort XR3i/XR4i +6 bhp £293.75
Fiesta XR2i/Escort XR3i +5 bhp £293.75
Sierra 1.8 +8 bhp £293.75

Honda
1.8 Vti <2000 +12 bhp £411.25
Civic Vtec <2000 +10 bhp £411.25

Peugeot
106 1.3/1.6 Rallye +8 bhp £293.75
206 GTI 180bhp +8 bhp £293.75
106 1.1l +5 bhp £293.75
306 GTi-6/Rallye +10 bhp £293.75
206 Gti/S16 +10 bhp £293.75
206 1.6 +8 bhp £293.75

Renault Clio Sport 172/180 inc Cup +10 bhp £293.75
Clio/Megane/Scenic 1.4 16v <03 +6 bhp £293.75
Clio/Megane/Scenic 1.6 16V <03 +8 bhp £293.75
Clio/Megane/Scenic 2.0 16V <03 +10 bhp £293.75
Clio 1.2l 8V +5 bhp £293.75
Clio V6 Sport +10 bhp £293.75
Clio 1.4 +5 bhp £293.75

Rover
25/45 1.4l +6 bhp £293.75
45/75 2.0l V6 +10 bhp £293.75
25/45 1.6l +8 bhp £293.75
25/45 1.4L +6 bhp £293.75

Vauxhall
Astra/Corsa 1.2 16V +5 bhp £293.75
Corsa 1.8 16V +8 bhp £293.75
Calibra/Cavalier 2.5 V6 +12 bhp £293.75

Volkswagon
Polo 1.0 +4 bhp £293.75
Polo 1.4 16v +8 bhp £293.75
Jetta 1.6 20V +8 bhp £293.75
Golf/Jetta 1.8 +5 bhp £293.75
Jetta/Golf/Scirocco 1.8 16v +5 bhp £293.75
Golf 2.0 16V/20V +10 bhp £293.75

Now tell me what's best, 5bhp for £300 or a minimum of 25 bhp for £575?