• If you currently own, previously owned or want to own an Avalanche, we welcome you to become a member today. Membership is FREE, register now!

Performance Fuel injectors and Large Cats

mdovenmuehler

Full Member
Joined
Sep 18, 2018
Messages
54
Location
Twin Falls, Idaho
Anyone have any luck with performance fuel injectors if there are any out there and had any performance from larger catalytic converters? 2005 model so the o2 sensors are before the cats and I just hit 155555 miles :) and was thinking to change the fuel injectors to a performance set, which I really have not found let alone whether its necessary to change them, both for that matter. If you don't think its necessary tell me but if you have done it and seen any changes in performance let me know.
 

ygmn

This is a Custom Title
Staff member
Administrator
Moderator
Charter Member
PM 2021
PM 2020
PM 2019
PM 2018
PM 2017
PM 2016
PM 2015
PM 2014
PM 2013
PM 2012
SM 2011
SM 2010
SM 2009
SM 2008
SM 2007
SM 2006
SM 2005
SM 2004
SM 2003
Full Member
Joined
Jan 17, 2002
Messages
34,999
Location
Bourbon St. Balcony
Stock is fine if you have done nothing else to engine.

Stock cats from all makes and models are very good at flowing exhaust for car they are on...
 

1stGenAvi5647

New Member
Joined
May 27, 2019
Messages
3
thanks man, well then I will leave them alone for the time being. Anyone have any info or something for me on the fuel injectors?
Hey like ygmn asked have you done anything else with the Engine? The factory fuel injectors are more than capable at stock power levels. But keep in mind any change in flow rate would require a retune in the pcm. Otherwise money would be better spent on a cam n springs. 😀

If you need more fuel I recommend going with a nice set of fast or just bumping to the 8.1 injectors on the cheaper side.
 
Top