These CSP Brand telescopic CSP Products push rod tubes for 356/912 have several advantages over stock push rod tubes! For one thing the internal spring made out of OTEVE70 spring steel keeps the perfect pressure on the seals when the engine expands due to warming or contracts due to cooling. For another thing the push rod tubes can be mounted without removing the cylinder heads, they do not have a smaller inner diameter and you can fit the stock brackets for the engine tin!
To protect the tubes from scratches while putting the brackets on we hard-anodized the tubes case-sided, the others are regular anodized. All necessary VITON O-rings and silicone push rod tube seals are part of this German-made set.
The particular highlight are the assembly tools, developed by CSP Products, too. You holds the two push rod tube halves together with the little aluminum fitting tool and insert the tube into the case. Now you guide the assembly plug through the cylinder head, place it on the tube, compress the two halves, remove the aluminum tool and relieve the assembly plug carefully until the tube sits properly in the cylinder head as simple as that!