I have a Jackson Supercharged GSR that has:
10:1 compression rollerwave pistons with eagle rods
84.5 mm bore, closed deck sleeved block
Full race head
Titanium valve springs and retainers
GSR intake cam Type r exhaust cam
AEM cam gears
Endyne blower modifications
LHT intercooler
Kamikaze header with 3" down pipe to 3" thermal exhaust.
I am stuck at 276 whp and 216.7 tq I am looking to get more power out of this set up and was wondering if its worth it try some other parts I dont know about or maybe get a 50 shot of NOS and set it up on my s300 to hit around 3rd gear to get top end power to make up for top end powerloss. Also the exhaust is a little loud and was wondering if there is a good muffler I can replace the thermal muffler with but still use the rest of the thermal piping.