Porsche Heat Riser Block Off Set - 356s/912 5460606SET 90002500302 until model year 1980 only

until model year 1980 only with M404 (stabilizer front and rear)

for Boxster (1997-1999) models

joined the team at Total Seal Piston Rings

The channel diameter is 36 mm

Requires drilling or grinding the factory rivets that retain the original coupler disc

Porsche Heat Riser Block Off Set - 356s/912 5460606SET 90002500302 until model year 1980 onlyPorsche When removing warm air duct tubes that blow to preheat carbs on 356 or 912 USA engines, these high quality plates can cleanly block off the resulting holes in the rear engine sheet metal plate. Sold as a pair, they fit both left and right sides and are compatible with 356 (1950 1954), 356A (1955 1959), 356B (1960 1963), 356C (1964 1965), and 912 (1965 1969) models.