Colby, these are from when I built a totally stock Revell '49 Merc wagon, it was from the California Wheels series, didn't include a stock engine or exhaust. I took the flathead and exhaust from the AMT '49 Merc coupe as well as various other bits and pieces from the AMT kit that either weren't included in the Revell kit, or were just nicer parts. Everything went together like they were one big 2-in1 kit! Hope this helps!