Quote:
Originally Posted by Juiced1
Generally when you use a header that is to big for your application you lose some torque down low. For LS3 application a 1 7/8 tube seems to be a great blend for top end power and torque. The 1 3/4" seems to be lost to the LS3 Camaro's but would actually be suited just fine for a bolt on car. I wouldn't recommend the 2" header to anyone under 800 HP or so.
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Grrrrr, show me some dyno charts that validate your claim of "loss of low end torque." You are perpetuating a myth!
The only drawback to larger primaries is cost (and fitment to a lesser degree). You do not lose low end with these cars with increases in primary diameter.