These are known to be one of the best to use in the world. For the quality you get the price cant be beaten!
Supertech is all I use on all engines builds. Their valve springs hold their seat pressure from day 1 for many years after!
4age 16v valve springs with retainers (stock ones dont fit) $630 inc GST (set of 16)
4age 20v springs only $350 incl GST (set of 20)
Plus all other makes & models. Just post up what you require.
Full catalog here: http://www.supertechperformance.com/ivalves.html
