catless Helix HFC
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From: Wherever is clever
Running it as a testpipe is no problem with me. I removed the substrate brick. Its nice and smooth inside like a testpipe.
Its just the "thermal barrier heat-shield" in the Helix HFC. Not sure if that will cause any problems.
"The Helix Hi-Flow cats are the optimal system for the performance minded EVO owner. This particular high-flow cat incorporates a 200 cell Metal-Substrate high-flow catalytic converter and thermal barrier heat-shield. The thermal barrier heat-shield assists in rapid warm-up of the cat for maximum efficiency and helps to keep exhaust gas velocities high.. Piping diameter is 3 inches and includes all neccessary hardware for trouble free installation. "
Its just the "thermal barrier heat-shield" in the Helix HFC. Not sure if that will cause any problems.
"The Helix Hi-Flow cats are the optimal system for the performance minded EVO owner. This particular high-flow cat incorporates a 200 cell Metal-Substrate high-flow catalytic converter and thermal barrier heat-shield. The thermal barrier heat-shield assists in rapid warm-up of the cat for maximum efficiency and helps to keep exhaust gas velocities high.. Piping diameter is 3 inches and includes all neccessary hardware for trouble free installation. "
