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2007 Chevy Cobalt

The GMPP intake picked up another 6.8 horses and 4.6 lb-ft, leaving us just shy of 149 fwhp and 140 fwtq (blue graph; all-stock is in red). Note our overall power gain with the GMPP intake and exhaust translates to roughly 5.8 percent, which on a 300-rwhp LS1 F-car would have bumped things up to over 317. That's pretty good for some simple bolt-ons! Also notice we're still seeing a slight reduction in AFR; assuming the readings were correct, it would appear custom tuning would help even this out, and bring additional gains over the factory calibration (tuning is by no means mandatory with these GMPP bolt-ons, of course).
2007 Chevy Cobalt - Practically Powerful

 The GMPP intake picked up another 6.8 horses and 4.6 lb-ft, leaving us just shy of 149 fwhp and 140 fwtq (blue graph; all-stock is in red). Note our overall power gain with the GMPP intake and exhaust translates to roughly 5.8 percent, which on a 300-rwhp LS1 F-car would have bumped things up to over 317. That's pretty good for some simple bolt-ons! Also notice we're still seeing a slight reduction in AFR; assuming the readings were correct, it would appear custom tuning would help even this out, and bring additional gains over the factory calibration (tuning is by no means mandatory with these GMPP bolt-ons, of course).  View Related Article

 

 

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