Description
1965-81 Pontiac, GTO, Lemans, Tempest, Firebird Grand Prix Bonneville 2 +2 Trans Am
326 389 400 421 428 455 from 65-81 – not correct but works for 301
CNC machined STAINLESS STEEL Heater Hose Head Fitting on back of head and 5 brass US made freeze plugs
6 piece kit – for all iron Pontiac heads D-port and Round port – 1 stop purchase
including Ram Air IV 455HO 455SD Tripower Ram Air III – all heads
The fitting that gets pressed into the back of the passenger side head for the heater to work. The short heater hose connects to it. These are usually destroyed or rusted. The freeze plugs should always be replaced as well. The 4 larger plugs are for the end of the heads, while the small plug is for drivers side head opposite of heater hose nipple.
The heater hose nipple or fitting is CNC MACHINED OF STAINLESS STEEL and made exactly the same as the original early models with brass spiral heat expansion for better engine warm up. The plastic or rubber insert ones came out later by Pontiac as a cheaper replacement and do not last as long as the unit I sell here. The brass spiral insert restricts flow at high rpm and it gives full pressure at low rpm to keep constant heat and pressure. Also installs easier then the cheaper version
These are the parts I use in my high end Pontiac engine builds! time tested Spotts Performance quality
see my other listing for less expensive steel plugs
