Cmi Big Tube headers
#1
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Cmi Big Tube headers
Boy just read tons of scary stuff about them leaking water in too cyls! What is the first sign? Of them leaking? I would think water would show up in oil real fast...... As about first sign....
Thank u
Thank u
#2
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Got a first hand look at a pair on a 1K blown big block a week ago at Laveycraft and they were stunning.
At 9K a set I expected a lot and wasn't disappointed.
Uncle Dave
#5
I thought the leaking issues were mostly with certain production OEM Merc headers made by CMI to Mercs specs.
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Throttles- Cleveland Construction 377 Talon
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Throttles- Cleveland Construction 377 Talon
08 OPA Class 1 National Champion
08 Class 1 Geico Triple Crown Champion
08 OPA High Points Champion
10 OPA Class 1 National Champion ( happy now Ed! )
#6
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#9
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We did some CMI testing on a NA engine. 1 7/8" Sport Tubes compared to 2 1/4" CMI Big Tubes. 805 HP vs 820 HP at 7000 RPM. It seems like a lot of $ for a small improvement in performance.
#10
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I think if I were you id just use the sport tubes then.
If you had a 1000 horse blown big block or a super high per N/A setup the results would be dramatic.
Whats your mill?
UD