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Spec TT LS3 Headers


I am going to be building my headers soon for my garage built Spec TT and I was wondering if I should build the headers with 1 3/4, 1 7/8 or 2" tube headers ? What is a good muffler to use ?

LS3 BITD 430hp ish

What are the other teams using ?

I am thinking 2" because bigger is better, but I do not want to loose any torque or not have enough back pressure.

dzrt performance

Well-Known Member
there s no right answer to this. everything from tube diameter, length to collector, overall length etc effect the engine and will impact the overall performance. the only way to optimize is to experiment in a dyno environment.