Quote:
Originally Posted by ZforMe
Do you need to update your sig?
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Done 
And the answer is no, the resonated test pipes do not impeed airflow. At least not the GTM's. They're straight pass thru like a true test pipe except it has that enlarged area to resonate the sound thru a grid inside the pipe wall.
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Performance GTM Stage 1 SC, GTM Res.Test Pipes, Invidia Gemini Exhaust, GTM HD Oil Cooler
Wheels & Suspension AME Tracer TM02's 19x9.5F 19x10.5R w/ 265x35F & 305x30R, Hotchkis Sways, BC (BR) Racing Coilovers (Car Sold)
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