So the Title says it all really...........on Kenne Bell website it says the 2.1L can handle up to 750HP and when you read the description on the 2.6L it says its good for 655HP? So will the 2.1L fit and work on and 03-04 SVT COBRA with a Stock Motor and can anyone please tell me the difference between the 2.1, 2.6 and 2.8 other than the size and capacity? Thanks in advance guys.