[NASSTY]

The yella terra kit is pricy but look at the detail they've gone too; custom intake manifold that locates the s/charger underneith the manifold while still retaining the OE upper manifold which gives a near stock look. Very stealth indeed.

A centrifical kit like the ones Capa offer require much less tooling to fit and that's why they're cheaper.

All depends that characteristics you want too. A PD blower will give instant boost at low rpm but the boost will fall off to some degree as rpm rises as well as generating alot of heat so intercooling is more important. Centrifical blowers boost increases as rpm rises giving a more linear power curve and generate less heat but don't produce much boost at low revs.

Cheers