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22 The blue trace on this graph is from when the truck was stock, save for the MagnaFlow after-cat and high-flow cats; the red trace is after the cam and intake were added. As you can see, comparing the red (no headers) and green (with headers) traces, peak numbers jumped to 320.9 hp and 331.6 lb-ft, increases of more than 20 hp and just shy of 20 lb-ft—gains that were pretty darn consistent throughout the rpm range. The new timeslips at the 1⁄8-mile showed excellent gains too, with a best of 8.98 at 76 mph—that’s stock LT1 F-body territory! View Related Article
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