Hi,
Today I installed the Injen Axle Back Exhaust for my 2012 civic si. Before the install I had a K&N intake and a ECU reflash and at about 7200 rpm (redline) on 2nd gear, I could hit 55 mph. Now with the injen axle back exhaust, I can only hit 50 mph at 7200 rpm (redline). I'm thinking that this reduction in speed (mph) is uniform throughout the gears and rpm range (although I don't have specific numbers).
The axle back exhaust noise is different than stock but the thing that worry's me is that the tone changes. Sometimes between 2000-4000 rpm (normal driving) it sounds pretty quiet but sometimes it sounds awfully loud. The sound is not consistent.
Are the 2 changes I mentioned above (lower speed at a given rpm) and sound of the exhaust constantly changing normal or do you guys think I installed it incorrectly?...meaning the fit between the new axle back and the existing cat back exhaust pipe wasn't tight?? If the exhaust connection isn't fit tightly can these problems occur? Or are the changes I mentioned normal?
Any suggestions you can give me would be helpful for I'm completely new to cars and adding parts is a first for me.
Thanks,
Mike
Today I installed the Injen Axle Back Exhaust for my 2012 civic si. Before the install I had a K&N intake and a ECU reflash and at about 7200 rpm (redline) on 2nd gear, I could hit 55 mph. Now with the injen axle back exhaust, I can only hit 50 mph at 7200 rpm (redline). I'm thinking that this reduction in speed (mph) is uniform throughout the gears and rpm range (although I don't have specific numbers).
The axle back exhaust noise is different than stock but the thing that worry's me is that the tone changes. Sometimes between 2000-4000 rpm (normal driving) it sounds pretty quiet but sometimes it sounds awfully loud. The sound is not consistent.
Are the 2 changes I mentioned above (lower speed at a given rpm) and sound of the exhaust constantly changing normal or do you guys think I installed it incorrectly?...meaning the fit between the new axle back and the existing cat back exhaust pipe wasn't tight?? If the exhaust connection isn't fit tightly can these problems occur? Or are the changes I mentioned normal?
Any suggestions you can give me would be helpful for I'm completely new to cars and adding parts is a first for me.
Thanks,
Mike