FLANGE: 4" | B: 8-1/2" | T: 8-1/2" | L: 11"
 
No you have a great replacement for the NAPA 6637 filter with your Tymar intake. The AFE 24-91042 Pro 5R BHAF (Big Honkin' Air Filter) for your diesel pickup is designed as a universal high-flow alternative to the popular paper disposable BHAF (Big Honkin' Air Filter) commonly used in many universal applications. Testing shows that this filter outlflowed the BHAF by up to 19%. Unlike the paper versions these filters are washable and re-usable for multiple cleaning cycles. 
 
The AFE 21-90058 Pro Dry S BHAF (Big Honkin' Air Filter) for your diesel pickup is designed as a universal high-flow alternative to the popular paper disposable BHAF (Big Honkin' Air Filter) commonly used in many universal applications. Testing shows that this filter outlflowed the BHAF by up to 19%. Unlike the paper versions these filters are washable and re-usable for multiple cleaning cycles.
 
The AFE 72-90058 Pro-Guard 7 BHAF (Big Honkin' Air Filter) for your diesel pickup is designed as a universal high-flow alternative to the popular paper disposable BHAF (Big Honkin' Air Filter) commonly used in many universal applications. Testing shows that this filter outlflowed the BHAF by up to 19%. Unlike the paper versions these filters are washable and re-usable for multiple cleaning cycles.
 
Cross reference: 
Wix 46637
Napa 6637
Donaldson ECB085011
 
Replacement AFE Clamp 03-50010