Long tube headers and original exhaust
10-20-2016, 02:08 PM
#1
Burning Brakes
Thread Starter
Long tube headers and original exhaust
I'm sure this has been asked before but here goes.
What is involved in hooking up LG long tube headers on a 09 base LS3 to the original NPP exhaust?
What is involved in hooking up LG long tube headers on a 09 base LS3 to the original NPP exhaust?
Last edited by DDP; 10-20-2016 at 02:10 PM.
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DDP (10-20-2016)
10-20-2016, 06:35 PM
#4
Le Mans Master
I have LG's and the original NPP exhaust ... they fit great and sound fantastic not to mention the power gain
Headers bolt right up but getting the cats , X pipe and mid pipes to line up was a challenge as they are all slip fit and real tight .
You have to take the mufflers down off the hangers
Start at the front and slide the cats on the headers , then slide the crossover pipe in place , then the mid pipes , make sure they are all lined up and straight , then slide your exhaust pipes in
After a few raps with a block of wood we got each pipe to where it needed to be and tightened the clamps up
After a few days we put it back up on the lift and fixed one leak , pipe was just not in far enough as it is a bit of a guessing game with all these slip joints , No leaks or rattles since
I would rather have a one piece catted crossover mid pipe design that bolts to the headers like Kooks but once you figure it all out it fits fine
Dave
Headers bolt right up but getting the cats , X pipe and mid pipes to line up was a challenge as they are all slip fit and real tight .
You have to take the mufflers down off the hangers
Start at the front and slide the cats on the headers , then slide the crossover pipe in place , then the mid pipes , make sure they are all lined up and straight , then slide your exhaust pipes in
After a few raps with a block of wood we got each pipe to where it needed to be and tightened the clamps up
After a few days we put it back up on the lift and fixed one leak , pipe was just not in far enough as it is a bit of a guessing game with all these slip joints , No leaks or rattles since
I would rather have a one piece catted crossover mid pipe design that bolts to the headers like Kooks but once you figure it all out it fits fine
Dave
The following users liked this post:
DDP (10-20-2016)
10-20-2016, 07:14 PM
#5
I have LG's and the original NPP exhaust ... they fit great and sound fantastic not to mention the power gain
Headers bolt right up but getting the cats , X pipe and mid pipes to line up was a challenge as they are all slip fit and real tight .
You have to take the mufflers down off the hangers
Start at the front and slide the cats on the headers , then slide the crossover pipe in place , then the mid pipes , make sure they are all lined up and straight , then slide your exhaust pipes in
After a few raps with a block of wood we got each pipe to where it needed to be and tightened the clamps up
After a few days we put it back up on the lift and fixed one leak , pipe was just not in far enough as it is a bit of a guessing game with all these slip joints , No leaks or rattles since
I would rather have a one piece catted crossover mid pipe design that bolts to the headers like Kooks but once you figure it all out it fits fine
Dave
Headers bolt right up but getting the cats , X pipe and mid pipes to line up was a challenge as they are all slip fit and real tight .
You have to take the mufflers down off the hangers
Start at the front and slide the cats on the headers , then slide the crossover pipe in place , then the mid pipes , make sure they are all lined up and straight , then slide your exhaust pipes in
After a few raps with a block of wood we got each pipe to where it needed to be and tightened the clamps up
After a few days we put it back up on the lift and fixed one leak , pipe was just not in far enough as it is a bit of a guessing game with all these slip joints , No leaks or rattles since
I would rather have a one piece catted crossover mid pipe design that bolts to the headers like Kooks but once you figure it all out it fits fine
Dave
What Dave said +1
10-21-2016, 02:42 PM
#7
Race Director
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Location: Raleigh, NC
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St. Jude Donor '15
No. Long tubes+x pipe will replace factory manifolds/cats/H or H pipe and connect to the factory axle back.
Last edited by schpenxel; 10-21-2016 at 02:42 PM.
10-21-2016, 03:25 PM
#9
Race Director
Member Since: May 2004
Location: Raleigh, NC
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St. Jude Donor '15
Correct
10-21-2016, 04:03 PM
#10
Le Mans Master
It will all come in the "box"
headers , cats, cat delete pipe, crossover , mid pipes , oem gaskets, good quality clamps and O2 extensions ... one of the most complete kits and one of the best price
they fit great , sound fantastic
While there are a lot of great vendors , Look up Damian at Wild Vettes , a forum vendor , best price , good advice and fantastic customer service ..
Dave
headers , cats, cat delete pipe, crossover , mid pipes , oem gaskets, good quality clamps and O2 extensions ... one of the most complete kits and one of the best price
they fit great , sound fantastic
While there are a lot of great vendors , Look up Damian at Wild Vettes , a forum vendor , best price , good advice and fantastic customer service ..
Dave
Last edited by Dcasole; 10-21-2016 at 04:03 PM.
10-21-2016, 04:11 PM
#11
Burning Brakes
Thread Starter
Thanks Dave, although the thing is I will be buying a set of used headers from another forum member up here in Canada and I was trying to figure out the least expensive way of hooking them up to my NPP exhaust. I thought I read somewhere that it could be done using the original cats as well.
10-21-2016, 06:36 PM
#12
Le Mans Master
Thanks Dave, although the thing is I will be buying a set of used headers from another forum member up here in Canada and I was trying to figure out the least expensive way of hooking them up to my NPP exhaust. I thought I read somewhere that it could be done using the original cats as well.
that might be more work than its worth , factory cats areb up next to the exhaust manifolds , you could cut the original pipes down by where the collector will be and somehow connect it to the header collector but you will loose the cats ... and you don't want to do that as you will get a heavy smell of gas .....even with my high flow cats I still get some raw gas smell when the cats are cold b
your best bet would be call LG and order just the cats , crossover ,midpipes ,clamps ,gaskets and O2 extentions
I am sure they would be happy to help out plus you can be assured of a nice rattle free good sounding exhaust
You will be happy with the outcome , it's one of the best mods I have done !
Don't forget to get a tune , mail-order or Dyno or it will not run its best and you will get a CEL if you don't tune the rear 02 sensors out . I installed my rear O2 sensors even though they are tuned out on the chance that I might get a "visual" inspection
Good luck and let us know how it works out
Dave
10-21-2016, 07:39 PM
#13
Burning Brakes
Thread Starter
that might be more work than its worth , factory cats areb up next to the exhaust manifolds , you could cut the original pipes down by where the collector will be and somehow connect it to the header collector but you will loose the cats ... and you don't want to do that as you will get a heavy smell of gas .....even with my high flow cats I still get some raw gas smell when the cats are cold b
your best bet would be call LG and order just the cats , crossover ,midpipes ,clamps ,gaskets and O2 extentions
I am sure they would be happy to help out plus you can be assured of a nice rattle free good sounding exhaust
You will be happy with the outcome , it's one of the best mods I have done !
Don't forget to get a tune , mail-order or Dyno or it will not run its best and you will get a CEL if you don't tune the rear 02 sensors out . I installed my rear O2 sensors even though they are tuned out on the chance that I might get a "visual" inspection
Good luck and let us know how it works out
Dave
your best bet would be call LG and order just the cats , crossover ,midpipes ,clamps ,gaskets and O2 extentions
I am sure they would be happy to help out plus you can be assured of a nice rattle free good sounding exhaust
You will be happy with the outcome , it's one of the best mods I have done !
Don't forget to get a tune , mail-order or Dyno or it will not run its best and you will get a CEL if you don't tune the rear 02 sensors out . I installed my rear O2 sensors even though they are tuned out on the chance that I might get a "visual" inspection
Good luck and let us know how it works out
Dave
The next plan is to do it now or try to find the parts over the winter and make it an early spring project.