These are a great bolt on modification for the Ecotec. The stock manifolds are very restrictive and prone to cracking. Made from 100% 304 stainless steel, Rath Gibson tubing(the absolute best), and fully tig welded. These are also the only header made for these cars with a merge collector.
Specs: 16 gauge tubing, 3/8" thick flanges, has two O2 sensor bungs