GM Quad 4 High Output Engine Blueprint Series T-shirt
The engine family known as the Quad 4s was debuted to the public in the spring of 1987. The Quad 4 is a 2,260.5 cc (2.3 L; 137.9 cu in) DOHC inline four-cylinder produced by General Motors' Oldsmobile division. The Quad 4 name is derived from the engine's four-valve, four-cylinder layout. The engine was a modern design for its time, using a cast-iron block and an aluminum head. Even though belts were more popular for this purpose on OHC engines at the time, chains were used to time the camshafts to the crankshaft. The water pump is also driven by the timing chain. The Quad 4 was the first wholly domestic regular production DOHC four-cylinder engine designed and built by GM; the only prior DOHC four-cylinder engine offered by GM was the Cosworth Vega, which featured a DOHC head designed by Cosworth in England.
We're offering this design in 2 different shirt choices: our 100% cotton that fits true to size and favorite, the Tri-Blend which is stupid soft and fits a bit snug---size up for this option.
Next Level Mens Triblend
50/25/25 polyester/combed ringspun cotton/rayon
Set-in 1x1 baby rib collar
District Unisex Shirt
4.3-ounce and 30 singles
Rib-Knit Crew Neck
Double needle sleeves and hem