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1 5/8" vs 1 3/4" shorty headers

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3.2K views 9 replies 5 participants last post by  hemidriver  
#1 ·
Looking at either Doug Thorley or BBK shorties. BBK's are 1 3/4" and Doug's are 1 5/8". On a bolt on car (09 RT) with stock heads/cam which one would be better? Is there a big performance difference on the two for a fairly stock car? Seems like the Doug Thorley headers are the only ones I've seen in 1 5/8". Thanks!
 
#3 ·
It's a 1/8" difference. It won't be noticeable, like be said go with the one with a better collector, or the higher quality one.
 
#10 ·
Come to find out the Doug Thorleys are for pre-'09 cars. Matter of fact the BBK's I'm looking at are listed for '06-'08 Chargers so.....no idea what to do. Guess I wasn't paying attention to the port difference on the '09. I'm limited to $300 right now so I may have to put them off until I can save and get some JBA's which are shown to work with '09's. I'd really like to get some stock 6.1 headers but those seem to be impossible to find right now.