In recent years the Spectras have been made in China, not Mexico or North America, and I think the quality has degraded.
Two Spectra model #CU624 (2-deep core, for extra cooling) installed on my 94 5.7L TBI engine, and both started leaking at the drain **** within 6 mos.
I even tried stacking a 2nd flat rubber gasket on the drain plug, still leaked, assume something defective inside the female portion of the valve.
Autozone has very liberal warranty & replacement policies, so after returning the 2nd radiator I'll look for some other brand.
The positive features of the Spectra were:
- oil & trans cooling fittings matched up exactly.
- heavy duty 2-row radiator cools extremely well (standard OEM was 1 row).
Even though cooling system was in pretty good shape, engine temps dropped 10º with the 2-row rad and it never, ever overheats. I dont tow, but no problems on 5-6 mile long, 5-6% grades in 90+ ºF summer heat. (Interstate 5 northbound, the "grapevine" climb, in So Calif)