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2011 cts coupe 3.6
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12 Posts
Discussion Starter #1
Does anyone know if the 3.6 2011 coupe has mandrel bent headers. I want to get more hp by letting the engine breath better. Im thinking CAI/ headers / catback. Hopefully i can dyno tune and maybe flash my chip and end up with around 360hp. What do you all think
 

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18 Coupe, turbo, auto, dp,E 85,tune
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825 Posts
Thats only on the 2012 engine. The headers are detachable on the 2011 engine, but I never found anyone that offered them.
 

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2010 CTS Sedan, 2012 CTS Coupe, 2015 ATS Coupe
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71 Posts
Looking into the lineage I found the following:

www.gmpowertrain.com has some pictures to show the "Headerless" integrated designs dating back to 2010 on the 3.0L but only more recently on the 3.6L

3.0L VVT DI (LF1) 2012 - 270 HP / 223 TQ, 2011 - 270 HP / 223 TQ, 2010 - 270 HP / 223 TQ
3.0L VVT DI (LFW) 2013 - 270 HP / 223 TQ, 2012 - 270 HP / 223 TQ
3.6L VVT DI (LFX) 2013 - 318 HP / 275 TQ, 2012 - 318 HP / 275 TQ

The older 3.6 DI motor did not have the "Headerless" integrated manifold designs but is no longer in use (US Market- Cadillac)
3.6L VVT DI (LLT) was a 2011 - 304 HP / 273 TQ, 2010 - 304 HP / 273 TQ, 2009 - 304 HP / 273 TQ, 2008 - 304 HP / 273 TQ,
 
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