the car is just like i bought it

K&n cone intake
bonez superflow cat (1)
borla exhaust

it seems like it runs much faster than other rx7's i have driven which leads me to believe it might be ported. my gas mileage is lower than other7's but it is also running rich. how would i know if it was ported without taking the engine apart? thanks. any other suggestions to improve my hp without goind turbo or nitrous. thanks



my engine was rebuilt by rotary performance about 2 years ago, based on the price of the rebuild on my receipt i think it was ported but rotary performance is not able to tell me, will find out when i take it apart to port it