No. Splitfire is a good coil pack to run... OEM coils are hit or miss.. I have ran fresh stock coils to about 750 rwhp .. which was 30 psi on a 35R and a 100 wet shot. No misfire... and then sometimes I've had to replace them as low as 300 rwhp on older motors. Splitfires work well under any conditions you could give your motor.

Martin