Spedeworth / Incarace would like to remind all drivers of the exhaust rule within Lightning Rods.

The 2015 rule reads as follows:-

EXHAUST SYSTEM

The standard exhaust system may be retained, or AX891, Laws or Simpson ORC225 or Edwards exhaust silencer. A minimum of 2” (50mm) and a maximum of 10" (254mm) section of tail pipe must be fitted to the silencer facing rearwards or down - THIS WILL BE MEASURED FROM THE REAR OF THE BOX (NOT THE PIPE). The front downpipe must remain standard; you may weld a maximum 1½ ” (38mm) plate in between 2 down tubes to stop them breaking off and you may, at the bottom of the downpipe, fit a fuel mixing sensor the front downpipe can only be modified at the tail end to allow the exhaust to run through the car, by shortening by up to 1”. If this modification is made, the joining pipe must either fit inside the front pipe or it may be butt-welded to the front pipe. The flange may be removed. If exhaust systems pass through the car they must be covered. If a silencer becomes ineffective during racing or practice, the car will be withdrawn from the event. Exhaust must terminate towards the rear of the car and may not terminate through the side of the car.

At the 2015 National Championship weekend at Hednesford Hills Raceway over the weekend of the 1st & 2nd August checks will be made on cars to ensure they meet the specification of the rules.