What type of metal is it?

These are machined from 303 stainless steel.

Fit On mini cooper s 03

Hi Salvador, Yes, it will fit any R53 MINI Cooper S from 2002-2006. Thanks!

what number spark plugs would be best to run with that Cravenspeed 17% pulley

We recommend one step cooler than the stock BMW/MINI recommended plugs.

What about changing the crankshaft pulley to spin it faster

Sure, but you can only reduce the crank pulley diameter so much resulting in a 2 to 4% increase. The real reason to switch the crank pulley is to reduce parasitic weight. Do them both and you achieve a greater increase with a weight benefit. Example: 15% supercharger pulley + 2% crank pulley = 17% overall size reduction plus parasitic weight saving. That combination results in more power and engine response than opting for the 17% pulley.

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Manufacturer	Cravenspeed
Brand	CravenSpeed
Item Weight	15.2 ounces
Package Dimensions	6 x 3.8 x 2.2 inches
Item model number	CRMC-0011-S
Is Discontinued By Manufacturer	No
Exterior	Milled
Manufacturer Part Number	CRMC-0011-S

CravenspeedSupercharger Pulley 15% Reduction by CravenSpeed

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