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No "Stock" baseline... but here's the comparison going from the cat-back, to the headers, to the tune:
2011 LS3 w K&N, Magnaflow Comp Cat Back:
395.26 rwhp
383.38 torque
W/ SW 1 7/8" LT Headers NO tune:
415.7 -r
408.58-t
Completed, WITH tune:
427.99 -RWHP
416.15 -TORQUE
Not too shabby, especially at 95 degrees and 90% humidity!
Need to come up with another 22 HP and I'll be happy!
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