Originally Posted by HDDP
So, Now I'm confused... LET is making a set of headers that has the same design as the OEM and also the SuperSprint for the C320 ? WHY ? The design is the problem, that H pattern is what is robbing power...
If you're going to do some R&D and build some headers, create a equa-length outlet from each cylinder into a merge collector, these are called tuned headers that maintain equal back pressure on each cylinder and will help maximize HP gain... Otherwise, You are just re-packaging the OEM... Which actually are pretty good considering you are pushing exhaust gasses at high pressure into a tube at a 90 degree angle... Really bad idea !!!
What's the HP gain from SuperSprint ? 7HP ? WHOOPTIDOOO YAHOO !!!!
I think this will be some good reading for the interested parties and those attempting to manufacture / sell "High Performance" headers...
http://headerdesign.com/extras/design.asp
http://www.burnsstainless.com/TechAr...ry/theory.html
ok, let's stick to the facts of what we know so far...
1. LETMotosport headers are not like any other header on the market, not Supersprint, not evosport...
2. the evosport headers and supersprint headers are the EXACT same design, they are a 3 into 1 collector design...look at the pictures on the supersprint and evosport website, you can clearly see this...
3. i ran the evosport headers on my car for 3 months, just so that i could do some testing and saw no gains in hp, even after dynoing the car several times under different conditions...
4. the minute that i bolted the prototype LETMotorsports headers on the car, i could tell that it was breathing better and the dyno proved that...
5. the problem with the supersprint design is the collector sizing. granted, this is not their fault, as you can not go any bigger and still mate to the stock exhaust.
6. there are also space constraints within the engine compartment that you have to deal with...this is a given, but it is impossible to make a shorty-style equal length header within the space that we have and still have a cost effective product.
7. as jerry said, if you want a true equal length, long-tube header that will make another 10hp, i will be glad to make it for you, just send me your car and a blank check, i can have it done next week