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I'm looking at either the DINAN performance upgrade and the Shark Injector. The DINAN runs $399 and the Shark Injector runs $350. Anybody have any opinions on which is better?
 

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I am not sure what the shark injector does, but I have the dinan upgrade and for sure I feel the difference in throttle response and amount the other things that it does. (rasies rev-limit and remove governor)

I would definitely go with dinan especially if your car is still under factory warranty.
 
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