isr mod
 

i was wondering what you thought about doing an isr mod on my 96 tacoma with the 3.4 would it produce the same effect as the 4runnner. i already have a deck plate installed and i want to do this mod to increase sound but i dont want to have to run premium gas to keep motor from pinging
i also heard about noticeable loss in mpg and i cant afford that lol
Whats the good word???

ive got the isr mod and the deckplate mod done with a trueflow filter and run only regular 87 no loss in gas mileage worth the 10 bucks i spent