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
68PowerWagon
Cummins HO
2 3
Replies
23
Views
3K
MoparProud
M
R
2017 3500 Heavy Duty poor fuel mileage
Replies
9
Views
2K
12Aries
12Aries
R
Fuel economy changing
2
Replies
11
Views
2K
12Aries
12Aries
68PowerWagon
3.73 Gears for Diesel?
Replies
3
Views
1K
68PowerWagon
68PowerWagon
J
2011 2500 Cummins Troble Codes: O2 sensor, Turbo boost, exhaust pressure
Replies
3
Views
164
mtnrider
mtnrider
P
partially clogged exhaust and did not know
2
Replies
10
Views
428
Fuel35 67
Fuel35 67
TMyers
MM3 Diesel Tuner Question
Replies
1
Views
196
mtnrider
mtnrider
A
Best tuner
Replies
1
Views
348
MADDOG
MADDOG
S
Commercial Settings PIN
Replies
1
Views
269
NH RAM
NH RAM
Johnny G Bagwell
Fuel Additives
4 5 6
Replies
56
Views
11K
6speedcummins
6speedcummins
S
Tune advice
Replies
7
Views
502
Gr8bawana
Gr8bawana
O
Performance at higher altitude
2
Replies
14
Views
950
jdhreiss
jdhreiss
GSPKurt
Hood Vents In CTD Hood
2
Replies
12
Views
2K
Treburkulosis
Treburkulosis
P
Please help, 2010 2500 6.7 losing power
Replies
0
Views
277
Paul Wayte
P
L
Loosing coolant....Help!!!!
Replies
3
Views
567
Dennis Shellito
D
Oliver Closehauf
Stock air box vs aftermarket high flow filter
Replies
4
Views
954
Oliver Closehauf
Oliver Closehauf
Goose55
Anticipating 6.7 Blown Head Gasket & ARP Replacement Head Stud Kit
Replies
4
Views
858
Dennis Shellito
D
T
Hamilton Valve Springs PushRods and Billet Bridge's !!
Replies
0
Views
220
TwinnTibbsDiesel
T
Orlando70
MM3 vs. Eazy Link for 2019 2500 CTD
Replies
3
Views
705
Orlando70
Orlando70
T
2008 Dually Compound Turbos !
Replies
1
Views
452
TwinnTibbsDiesel
T
Texas Outlaw
Performance tuner
Replies
1
Views
964
MADDOG
MADDOG
M
14 Cummins trans issue
Replies
0
Views
291
Micky Gilbart
M
Billythe kidd
Suggestions on a muffler and resonator
Replies
1
Views
585
tidefan1967
tidefan1967
Neil D Cooke
Auxiliary Fuel Tank
Replies
1
Views
1K
OLEJOE
O
B
Winter Prep
2
Replies
12
Views
2K
Robeffy
Robeffy
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