Do you guys know if E-Cutouts would be beneficial to the Lexus IS-F.. and if so, Would they increase or decrease HP... I'm just affraid the IS-F already has a very high quality Exhaust system... Also, do you know what the size of the Exhausts are (I.E 3 inches, 3.5 inches, 4 inches???)

 

Plus it sounds incredible with the cutout's open... a couple of my friends with a Mustang GT and Daytona Charger have them... and there loud as fu*K

 

lol.. can anyone help me??????????????

 

i am afraid no one knows man. you could be the first!! Its only metal and can be put back to stock.