This has been battled about at least 50 times or more.MR.C5 said:SuperMAXX by Dynatech or LG Pro by LGmotorsports or some other.
This is a really bright group of folks, so before I lay down the coin - which is tight as it is - I want to hear from you guys.
Thanks for the time.
So you purchased LG Pro Long Tubes...and it sounds like you really like them...did you swap out your cat back or stay with stock?rpallas said:LG Pro Long Tubes get my support! They are the header of choice by the top 4 World Challenge Corvettes where money is no object. As mentioned, there have been debates on which provide more hp, and from what I have studied the LG's may be similar in hp increase but beat the others in torque gains which is what you feel when you hit the go pedal. :jawdrop: Lou and his group are great to work with, and they have excellent customer service. I wouldn't trade my LG's for any header on the planet! :thumb:
I agree. I guess I should have said could flow more volume. Great info.DJWorm said:Your assumption that a 2 /1/2" pipe reduces flow from a 3" pipe is wrong.
It all depends on where the 2 1/2" pipe is in the system and what the application is.
It has been shown that loosing CATS, increasing pipe size to 3" reducing back pressure and scavanging can actually reduce HP and flow.
It is important to keep flow velocities up as the exhaust gases cool downstream. This can be effectively done with a reduction in pipe size to 2 1/2". This retains exhaust gas temp., maintains flow, increases scavenging, increases HP and increases Torque.
The exception is when displacement is increased along with head and cam. Then a larger pipe may be benefiicial.
Mine has 4forloop said:Well, I'm not a header engineer by any means and it is very hard to compare these products side by side.
But, here is what I have learned.
Cost $500 to $600 More
IMHO, because LGM does not manufacture it. Borla does. So there is an extra middleman
3" to 3" Cat
Better flow, maybe worse on emissions
Proven to provide Torque and HP. Catch, they seemed to need to be adjusted to a particular car. Which is why they are normally slip-on. Also it is normaly not that much. Does it help, hard to say?
Only two oxygen bungs.
I think this has been changed or is in the process. If only two then simulators will be needed
You can put the cats ahead of the X-pipe as I did and are in relatively the stock location as they can be with 32" headers.Cats not close to stock location
This may cause it to be harder to pass a visual inspection. If this causes the cats to heat slower or not enough, it will hurt emissions.
X Pipe in front of Cats
I read this may help HP/TQ. I have not seen the science behind it yet. So I cannot judge for myself.
DJWorm said:It has been shown that loosing CATS, increasing pipe size to 3" reducing back pressure and scavanging can actually reduce HP and flow.
DJWorm said:The exception is when displacement is increased along with head and cam. Then a larger pipe may be benefiicial.