Engine and Performance

Ask any questions about performance here. Talk about your performance mods, specs and numbers.
ramhunter9
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Cummins Performance Section
Replies
2
Views
5K
quietpeen
quietpeen
Neil D Cooke
Auxiliary Fuel Tank
Replies
2
Views
1K
gsfitzsr
gsfitzsr
M
2004.5 H.O. slow to start.
Replies
5
Views
296
Dennis Shellito
D
F
Exhaust tip mods?
Replies
6
Views
509
Fuel35 67
Fuel35 67
68PowerWagon
Cummins HO
2 3 4
Replies
32
Views
6K
BossHogg
BossHogg
Johnny G Bagwell
Fuel Additives
5 6 7
Replies
61
Views
13K
BossHogg
BossHogg
A
Best tuner
Replies
6
Views
1K
Chains
Chains
J
2011 2500 Cummins Troble Codes: O2 sensor, Turbo boost, exhaust pressure
Replies
4
Views
509
Jim Perry
J
68PowerWagon
3.73 Gears for Diesel?
Replies
4
Views
2K
68PowerWagon
68PowerWagon
B
DPF Delete exhaust question
2 3
Replies
20
Views
8K
18Aries
18Aries
R
Fuel economy changing
2
Replies
13
Views
2K
6speedcummins
6speedcummins
R
2017 3500 Heavy Duty poor fuel mileage
Replies
9
Views
2K
18Aries
18Aries
P
partially clogged exhaust and did not know
2
Replies
10
Views
747
Fuel35 67
Fuel35 67
TMyers
MM3 Diesel Tuner Question
Replies
1
Views
731
mtnrider
mtnrider
S
Commercial Settings PIN
Replies
1
Views
393
NH RAM
NH RAM
S
Tune advice
Replies
7
Views
860
Gr8bawana
Gr8bawana
O
Performance at higher altitude
2
Replies
14
Views
1K
jdhreiss
jdhreiss
GSPKurt
Hood Vents In CTD Hood
2
Replies
12
Views
3K
Treburkulosis
Treburkulosis
P
Please help, 2010 2500 6.7 losing power
Replies
0
Views
379
Paul Wayte
P
L
Loosing coolant....Help!!!!
Replies
3
Views
797
Dennis Shellito
D
Oliver Closehauf
Stock air box vs aftermarket high flow filter
Replies
4
Views
1K
Oliver Closehauf
Oliver Closehauf
Goose55
Anticipating 6.7 Blown Head Gasket & ARP Replacement Head Stud Kit
Replies
4
Views
1K
Dennis Shellito
D
T
Hamilton Valve Springs PushRods and Billet Bridge's !!
Replies
0
Views
263
TwinnTibbsDiesel
T
Orlando70
MM3 vs. Eazy Link for 2019 2500 CTD
Replies
3
Views
893
Orlando70
Orlando70
T
2008 Dually Compound Turbos !
Replies
1
Views
551
TwinnTibbsDiesel
T
Texas Outlaw
Performance tuner
Replies
1
Views
1K
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