3+ years now. But also seeing that a stock T2/2.5 turbocharger will never push that much air and that the motor is divided in half, 1.5L per pipe is useless. I did it for bigger turbo upgrades and not wanting to buy over twice. When inline or straight motors can run a single 3.5" and push 900Hp, can you really see 6" of exhaust needed in most cases on turbo's rated so low? Not to mention, mine are SS as well and I paid $400 for the down pipes and $350 for the test pipes back in 99, still look brand new today.