Cyl Head Special B18/B20 "Stage 3"

Special Cylinder head "Stage 3" Ported intake & exhaust ports and modified combustion chambers. Double valve springs with aluminum valve retainers and special valve locks. New valve guides and new valves cut with 2 angles. Enlarged pushrod holes. Compression ratio depending on engine displacement etc. MIRA machined valve seats. Addition: Lead Conversion = SEK 1900 (discounted price) Bigger bolt for rocker arm bridge incl. Bolt (3/8") = 200kr ===Work is carried out on the customer's own cylinder head===