Reviewed By Steven B (Smithfield, UT) Reviewed for a 2004 Ford Mustang —11/29/2016 10:39 PM
Been using this product for years. Two 94 GTs and now on my 04' GT. Never fails to increase performance as promised. Would buy it again...Thanks
Reviewed By Linda R (Titus, AL) Reviewed for a 2008 Chevy Trailblazer —10/19/2017 4:11 PM
Jet seems to be the only programmer that works for the 4.2 chevy inline 6. No problem with the installation and I noticed an instant increase in the low end power. this is where the 4.2 really sucks. Don't know why they did not use the 4.3.