Looking to add some LG longtube street headers to my 03' vert with a Z06 titanium exhaust already in place. Good mod and how much louder will the car be? Thanx.

 

Great mod. Depending on what else you do (cats or none, X or stock H); about the same volume at idle, say 25% louder at WOT? More with no cats, more with the H... what are you doing with the middle section?

 

Sounds fairly quiet to me

 

Got an '04, six speed coupe that was delivered new with TI axle back. Recently installed LG headers, high flow cats and x-pipe. Did an ECS mail order tune and already had installed a honker CAI. I am very happy with the end result regarding performance and sound. IMO the TI exhaust really woke up. We attended a Corvette and Coffee event today. As usual, when cars left, the pedal was punched. I heard many exhausts leaving the parking lot. Some actually sounded good, many on the edge of obnoxious. Being loud and raspy for the sake of it shows no sign of class.
My present setup sounds pretty good to the redhead and me. Nice tone at idle, no drone on the highway and has a deep growl when the pedal is punched. Enough sound to be noticed but not sounding like a want-a-be. As a side note, if I want to really make some muscle car sound, I get into our '66 425hp coupe with factory side exhaust. Now we are talking pure car sex.
Chas

 

427 ???? I hate you !!!!!!!!!!

 

Well to make sure you hate me: Current garage inhabitants.
'66 427, 425hp coupe
Laguna blue, white and bright blue interior, factory side exhaust and knockoff wheels, close ratio four speed. Original car.
And just to really make sure, the car we took on our honeymoon almost thirty nine years ago:
'67 327, 300hp roadster
Lyndale blue, teal interior, both tops, euro export car, radio delete.
wide ratio four speed, original car.
Icing on the cake:
'73 L82 coupe
Yellow metallic, deluxe black interior, fully optioned minus map light
Close ratio four speed, original car.
And yes the '04 coupe.
Then add the '69 Chevelle SS 396, 325hp convertable
Yellow with black interior, A/C, close ratio four speed, original car
'72 K5 Blazer
Sky blue, parchment interior, A/C, factory four speed, heavy suspension, tach dash, factory posi both axles, 3:73. Almost original truck.
Have to be honest here, have owned all of these for many years, purchased long before any of the prices went sky high.
Would really like to meet you some day. You have been a good source of info regarding the '04. I understand the older, basic cars, the '04 is a new animal to me.
Had an absolutely miserable ten year experience owing an '85 coupe.
Almost did not buy another newer version based on the sour taste that car left, but so far the '04 has been a very good ride.
Chas

 

so it looks like I hate you times 8 !!!!!!! I liked my 85 !!!!!!

 

It will definitely be louder with the LT headers installed - not as loud as a set of aftermarket catbacks, but you will notice the difference.