I'm looking at either the AMS Resonated Test Pipe or the ETS Test Pipe, does any of both require a tune or can they run safely without a tune on 2009 MR?
AMS, http://www.amsperformance.com/cart/...subishi-Lancer-Evolution-X-10-Ralliart-Stainless-Steel-Resonated-Test-Pipe.html
ETS, http://www.extremeturbosystems.com/Evo-X-and-Evolution-X-Exhaust-Systems/
AMS, http://www.amsperformance.com/cart/...subishi-Lancer-Evolution-X-10-Ralliart-Stainless-Steel-Resonated-Test-Pipe.html

ETS, http://www.extremeturbosystems.com/Evo-X-and-Evolution-X-Exhaust-Systems/
