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Message: <blockquote data-quote="Adam" data-source="post: 9033" data-attributes="member: 8249">I ran the Accufab 75mm TB/Plenum. I ran 12.61@109 with it on. Car weighed 3270 and air was 1000'. I took the stuff off and ran 13.00@105 BUT, the car weighed 3348lbs, and the air was 1800'. So between the weight difference and the DA(density altitude) difference, I picked up VERY LITTLE with the 75 TB/Plenum and this is on a headswapped car (10.5-1CR), longtubes, cams,thats getting shifted at 6500rpms etc etc. So on a stock 2V or close to stock 2V? I'll let you guys make that call. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile    :)" loading="lazy" data-shortname=":)" /> The dragstrip is the best comparison for me. The stock stuff seems pretty adequate for a long time. Unfortunately the TB/Plenums are a flashy mod thats easy to do and relatively inexpensive so thats why everyone has them.Adam</blockquote>