Kooks are the way to go. I had JBA's on my 4.6L and went Kooks on my 5.4L. The Kooks just seem like a better product to me.

I can really speak to the difference in sound as they were on different motors.

 

I'll have to say, Kook's are made of 304 S/S so they will look fabulous. I love my JBA's and have seen dyno runs where they performed better than kooks headers on an exact-same setup. Kook's are a mid-length whereas JBA are full longtube.

304 s/s is beautiful though. Wish my jba's were 304....

 

PLstang doesn't really care. Look at that lucky bastard with a 5.4 in his 07' GT. Headers/exhaust and the 10-20hp/tq ratings they give you are the least of his worries. lol!

The Kooks are a VERY quality header system along with ARH (american racing headers). They are both 304 s/s. I like the ARH system dueto it's being a real long tubebut Kooks are really nice also.

I really hope to see your car next weekend PLstang. I'll be there for the meet of the Austin run. I can't wait to see your ride!!

 

Hey, I need those 20 HP!! [8D]

I'm planning on hitting Austin for the cruise still!

 

If you need those lousy 20! lol!!!!

Man I cannot wait to see that ride .

 

MAC LTs and O/R Prochamber for $929 at Brenspeed.

 

Kooks - Nothing but the BEST!

https://mustangforums.com/m_4952075/tm.htm

 

You have a PM.

 

all about the SLP, i love em, dynod 310/325, with SLP longtubes, catted slp xpipe and the loudmouths. CAI/JLT2 from evolution
only problem is that they bottom out on some speed bumps , but they sound great and get good power. (they may even be a little too long)