To set the record straight. I have used slp pipes, coated on my viper but only with the viper cdi box. I had underhood temp sensors on them, air box temp sensor, and after I burned it up, I bought a set of egts. I ran them for about 1000 mls and came to the assumption that, viper pipes, thought they work good , don't do what they should. I then after being told that srx pipes wont work, decided I would do whatever I had to do to prove them wrong. they fit and the key is the box. The box for trail riding is where your loosing fuel, using it to cool the piston. I purchased the slp pipes after talking to many who had run them on dynos and had acually compared them to other sleds, on timers, on dynos. They were also very quiet. I sold them, started on my quest. Looking back, I wish I had installed a srx box on my sled with the slp pipes and checked them out but I didn't.
The srx pipes worked great once I used the correct box(for an entire winter i had the viper box installed from racing and fogot to change it) and turned the EGTs off. Timing gives some weird readings when your changing timing that much. I believe the viper box has 7deg more timing at 8600 than a srx(please correct me if i got that wrong) that extra timing makes more heat in the motor and less in the pipe than the srx timing which makes your EGTs show in the 1500 range compared to the 1275 I was trying for with the slp pipes and viper box. Even when i changed out the box I still thought I had an issue. After checking everything, I turned it off and headed down the lake, checked the wash and was rich.
anyway, I have not tried the cdi box on slp pipes but I know from all my other testing what causes the fuel burning issue. that being said, you will not have the same power with the srx box. It is alot less timing and it will make alot less heat in the motor and less power. You will want to wrap those pipes, they loose alot of heat and this is what makes a motor more jetting friendly is when you can maintain all the temperatures.
You will save gas, you wont burn your sled down on decelleration (biggest problem with pipes running over peak timing curve) with a srx box.
If only those pipe makers were not looking at price, they would have sold pipes with a cdi box and pipe wrap, these two things would have made them the most popular pipe on the trail after the first year.
dont forget to install a srx base gasket when you go to pipes to even out the heat.