These are by Performance Springs and they are a performance upgrade for the Porsche 928 32V V8 engine.  They are a simple drop in set-up, remove the original base locators and shim and fit the base locator supplied with the kit. These install with 110Lbs seat tension and 235Lbs at .440lift. They are good for up to .500 valve lift. The valve guide may need to be trimmed down to lower the stem seals to use the full .500 lift but any machine shop can handle this operation.

INTERNATIONAL BUYERS PLEASE NOTE: Due to GST not being applicable the International sale

price is LESS 9%.

Please ASK for a shipping price to your destination.

Please Note: We are prepared to give discounts on multiple sets of springs of the same type or multiple sets of different

types so please don’t hesitate to ask, as they say, it costs nothing to ask.