I know there are alot of posts about LT's, but I've been running Mid's for 6 years and thought they where fine.... Was I wrong!!!! I'm sure they where fine until the first cam head upgrade. The car sounds completely different, reve's faster, pulls harder all the way to 6800 and it's quieter in the car. I will be going to the dyno in the next week or so, but I bet with my current combo I will gain 10-20 RWHP across the board, and who know how much peak. Well see.

In conclusion, I will say "I wish I would have bought the LT's to start with!!" if you don't plan on anything more than bolt-ons then the mids are fine but if you ever think you may do a head cam, or bigger cubes then save the extra money and buy LT's.

What I put on where a set of Coated Off Road Pacesetter long tubes and matching Y and they fit VERY well, with only having to take off the oil filter to install the drivers side, and a little grinding on the steering shaft knuckle.

 

You will probably gain more torque than horsepower especially in the lower rpm range.

 

What Y pipe were you running before and why did you change it ?

 

Pacesetter Mid-length headers come with a Y. I could not get the car to Reve on the dyno, and the long tubes freed it to reve easier.

 

My thoughts as well. I've had two sets of shortys (BBK's on a 94 Z28, Edelbrock on a 97 SS) and swapped my shortys out for Pacesetter LTs on my 97 SS in the Spring of 2010. Being a bolt-on car, I didn't notice much of an increase but I did it in preparation of a future heads/cam setup, that who knows will ever happen.

Shortys are great for a bolt-on car, especially if you have ground clearance but when your putting close to 400 horsepower to the rear wheels, you should definitely consider upgrading to long tubes. I always tell people to think of where they plan on ending up with their car when planning their exhaust.