Front+e85/e70..Does the front pipe really help on e85
 

So i recently got a catless frontpipe installed on my car. Driving it on stock tune and 93 tune the car feels like it benefited from the front pipe but nothing drastic. yesterday i switched to e85 and was like whoa my car never felt like this on e85. I called the station i got the e85 from and they told me their e85 is more like e72-74 since its still a winter blend according to them so i switched to e70 this morning and my car feels amazing. The power in my car is linear that for first time ever i chirped in 3rd gear on pretty much bald tires. Sent logs so i can get updated tune but is the stock front pipe that restrictive or does removing the cat benefit a car running on e85. Car just feels so different now just wondering if anyone had any insight on it.