We had a 2004 GTO to strip test in Southern California ... torque and mathematically calculates horsepower from that. So gear ratios in the trans and rear, the converter stall speed and tire ...

The additional $295.90 for the LeMans GTO package brought the sticker price to $2,776 (just under $28,000 in 2024 dollars). Standard rear-end gear ratios ranged from 3.08:1 to 3.90:1 ...