Our jet pipes are double walled and made from the highest standard materials,being light and strong.We deliver each pipe with fixing materials for an easy and fast installation.The standard diametre for this size of jet pipe is 112 mm (rear end, outside diameter).Please check the space in your model BEFORE your order !
The lengths in the shop are total lengths of the pipe. As the turbine reaches inside the aluminium inlet of the pipe, the length of your pipe needs to be calculated as follows:

For 15-30N pipes
Measure from turbine exhaust cone to the end of the plane`s nozzle PLUS 20 mm
For 40-80N pipes
Measure from turbine exhaust cone to the end of the plane`s nozzle PLUS 40 mm
For 80-160N pipes
Measure from turbine exhaust cone to the end of the plane`s nozzle PLUS 45 mm
For 160-250N pipes
Measure from turbine exhaust cone to the end of the plane`s nozzle PLUS 45 mm

Example: you have a 60 N turbine and measure a distance of 500 mm from your turbine outlet to the end of the plane, you add 40 mm and will have to order a pipe with a length of 540 mm.
Download installation guide for your Grumania pipe below the chart

                    You need help ? Call us !   0049 7123 380988

Note that all of our pipes are made for "regular pipes" with a standard exhaust nozzle. If Frank Turbines are used, the mounting position is very different.We strongly advise to contact the engine manufacturer before ordering a pipe. He has to tell you the exact mounting position. Remember that the wrong mounting position can cause extreme  underpressure inside the pipe, wich can cause a collapsing. For this reason, we do not give any warranty on our pipes, if a turbine with a long inner exhaust  cone - like the Frank turbines- is used !

Please note, that jet pipes are tailor made itmes and not stocked.Double check what you order- we do not accept returns.

The length table starts at 50cm ( minimum price ). If you want a shorter pipe, order the 50cm version and use the subject field to give us the wanted pipe length - we do any length you need !