Author Topic: 440 Header size.. 1 3/4 vs. 1 7/8  (Read 642 times)

Offline 7Dcuda

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440 Header size.. 1 3/4 vs. 1 7/8
« on: June 17, 2018 - 06:24:48 pm »
I have a street build 440, probably 425-450 horsepower.  I just installed the TTI 2 1/2" exhaust system with my current FlowTech 1 3/4" headers. Now I want to install the TTI  headers.  Should I stay with 1 3/4" or should I go with 1 7/8?  Not sure I need  the 1 7/8" for my HP level but would if it's beneficial performance wise.




Offline 1 Wild R/T

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Re: 440 Header size.. 1 3/4 vs. 1 7/8
« Reply #1 on: June 17, 2018 - 07:35:13 pm »
I've run 1 3/4, 1 7/8 & 2"....   For some reason the 1 7/8's just seem to match the 440's needs best..
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Offline 70chall440

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Re: 440 Header size.. 1 3/4 vs. 1 7/8
« Reply #2 on: June 17, 2018 - 08:24:50 pm »
I've run 1 3/4, 1 7/8 & 2"....   For some reason the 1 7/8's just seem to match the 440's needs best..

 :iagree:
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70 Challenger RT 440-6 EFI, 73 Cuda 416-6 EFI
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Offline 7Dcuda

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Re: 440 Header size.. 1 3/4 vs. 1 7/8
« Reply #3 on: June 17, 2018 - 08:35:19 pm »
Thanks for the replies.  1 7/8" it is!