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Just had kooks headers and a tune added to the sierra. 38 whp increase. 361 rwhp and 400 tq. Thanks to Swg performance. Results are on their fb page.
 

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Just had kooks headers and a tune added to the sierra. 38 whp increase. 361 rwhp and 400 tq. Thanks to Swg performance. Results are on their fb page.
What was your before and after torque?

Nice gains for sure, Direct Injection has really advanced the progression of power production of tehse GEN 5 engines. It allows higher compression ratios, with teh same octane fuel as comparted to Port Fuel Injection. This is esp. helpful in forced induction application.

peace
Hog
 

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Pretty impressive gains considering this is real world, at the wheels horsepower.

Any other mods or 100% stock other than headers and tune?
 

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I see the 38rwhp gain but don't see where its putting 361 down to the wheels on the FB page.
 
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Just had kooks headers and a tune added to the sierra. 38 whp increase. 361 rwhp and 400 tq. Thanks to Swg performance. Results are on their fb page.
Post dyno sheet
 

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Didn't get a sheet. I was standing there when he made the pull.
So you paid all this money to add extra power, and didn't want the trophy/proof paper?

Go back and tell them you want one. I'd frame that bitch.
 
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