The Sparco SP-305, a 3.9 litre electrically operated plumbed in fire system. Part number 014778EXL3.
The extra capacity is the reason to choose this over the 2.5 litre SP-205. More extinguishant means longer discharge, and in a bigger cabin or a car with a large engine bay that matters. Some regulations also specify a minimum capacity by vehicle type, so check the wording rather than assuming the smaller bottle will do.
Approved to FIA Technical List 16, with environmentally friendly AFFF extinguishant, complete with mounting bracket and straps.
What to check first
Technical List 16 systems are accepted in a great many series and not in all of them. A number of championships now require FIA 8865-2015, which sits on Technical List 52 instead. Read your own regulations before you order.
Where it has to go
The bottle is 346mm long and 130mm in diameter, which is a substantial thing to find room for and noticeably bigger than the 302mm by 110mm of the 2.5 litre. That difference is worth measuring for, because it is the usual reason someone ends up back with the smaller bottle.
It has to be mounted where a belted in driver can reach the actuator, with an external pull a marshal can reach. Both are scrutineered, and so is bottle orientation.
Alongside it
Most regulations that require a plumbed system also require a hand held bottle in the cabin. Tell us the car and the class and we will make sure the whole arrangement satisfies your scrutineer rather than most of it.
