Stock 1/4 Mile Time

[jon99z71]

What would a stock 99 ext cab 1500 Z71 5.3L auto turn the 1/4 in?

[cerbomark]

I ll guess at high 15 s.

[Schmids5.3l]

Probably high 15's/low 16's, depending on track conditions, weather, and altitude.

[fireman32_14]

how much would a tune and exhaust take off that?

[svensk]

After tune and exhaust you would probably be in the mid 15's. The drive by cable trucks really wake up with a tune.

[black00chev]

depending on what gearing u have in the read, it'll be high or low 16s... my truck with catback and K&N filter with 3.73s ran 16.9... my old truck with 4.10s wouldve ran a better 1/4.