Quote:
Originally Posted by boost4breakfast
Quote:
Originally Posted by ruderegime
The primary cats are obviously bigger more restricted. All four would make a difference. Not much gain from the 2 little secondary delet except sound.
|
they use high flow HJS cats. their fitment was slightly off on the secondaries but had to grind them a little. still smell a little fumes but you need primaries for the gain for sure. you’re correct with secondaries just being sound. went with them cause they guarantee no CEL. no shakes or vibrations after the install and the car is much faster especially around 3k rpm
 |
I'm glad that your happy with the delete. I have one cat in my Mazdaspeed Miata, and my other 2 modded cars have no cats, and I just sold my C7 Z06 with all 4 cats deleted. If I decide to purchase a F90 M5 I doubt I'll delete the cats doing to my wife wanted me to get a family car.
I'll be so happy if I get one.