Better MPG

Ultra-Core™ and Dura-Core Difference™

Ultra-Core
Core Depth Rows of Tubes Centers
1 1/2" 2 1/2" tubes on 3/8" centers
2" 3 1/2" tubes on 3/8" centers
2 5/8" 4 1/2" tubes on 3/8" centers
3 3/8" 5 1/2" tubes on 3/8" centers
* Available with smooth or dimpled tubes
Econo-Core
Core Depth Rows of Tubes Centers
1.296" 2 1/2" tubes on 9/16" centers
1.972" 3 1/2" tubes on 9/16" centers
2.658" 4 1/2" tubes on 9/16" centers
3 3/8" 5 1/2" tubes on 9/16" centers
* Available with smooth or dimpled tubes
Dura-Core H
Core Depth Rows of Tubes Centers
1 7/8" 2 1/2" tubes on 1/2" centers
2 1/8" 3 1/2" tubes on 1/2" centers
2 13/16" 4 1/2" tubes on 1/2" centers
3 1/2" 5 1/2" tubes on 1/2" centers
4 3/16" 6 1/2" tubes on 1/2" centers
4 7/8" 7 1/2" tubes on 1/2" centers
5 9/16" 8 1/2" tubes on 1/2" centers
* Available with smooth or dimpled tubes
* Louvered or non louvered fin
Dura-Core N
Core Depth Rows of Tubes Centers
1 7/8" 3 1/2" tubes on 5/8" centers
2 3/8" 4 1/2" tubes on 5/8" centers
3" 5 1/2" tubes on 5/8" centers
3 7/16" 6 1/2" tubes on 5/8" centers
4" 7 1/2" tubes on 5/8" centers
4 1/2" 8 1/2" tubes on 5/8" centers
* Available with smooth or dimpled tubes
* Louvered or non louvered fin
Dura-Core I
Core Depth Rows of Tubes Centers
1 7/8" 2 1/2" tubes on 1/2" centers
2 1/8" 3 1/2" tubes on 1/2" centers
2 13/16" 4 1/2" tubes on 1/2" centers
3 1/2" 5 1/2" tubes on 1/2" centers
4 3/16" 6 1/2" tubes on 1/2" centers
4 7/8" 7 1/2" tubes on 1/2" centers
5 9/16" 8 1/2" tubes on 1/2" centers
* Available with smooth or dimpled tubes
* Louvered or non louvered fin
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