Best Add Ons - Diesel Bombers
Diesel Bombers SIGN UP NOW

National Association of Diesel Motorsports
Go Back   Diesel Bombers > Chevy/GMC Duramax > Chevy/GMC Duramax 04.5-05 LLY > 04.5-05 LLY Performance
Sign in using an external account
Register Forgot Password?

Registered Members don't see these ads. Register now it's free!

04.5-05 LLY Performance Discussion of Chevy and GMC Trucks with LLY Duramax Turbo Diesel Engines Related To Performance And Longevity

Welcome to Diesel Bombers Forums!
Welcome to DieselBombers .com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Diesel Bombers Forums community today!

So I have messed with most areas on my truck and some have been improvements, others not so good. What have you found to be the best mod over all? Mine would have to be the exhaust or my boost stick. I have a 304SS ... JOIN NOW TO REMOVE TRACER

Best Add Ons

submit to reddit
LinkBack Thread Tools Search this Thread
Old 07-30-2007, 04:42 AM
Diesel Fan


Default Best Add Ons

So I have messed with most areas on my truck and some have been improvements, others not so good. What have you found to be the best mod over all?

Mine would have to be the exhaust or my boost stick. I have a 304SS Silverline 4" catless exhaust and I picked up 2 mpg with that right out of the box. The boost stick made my fuel milage jump up at first, but has come down a bit, probably because I am more into the gas with the predator 40hp installed. The boost stick also helped me to achieve 1250* max EGT's when earlier I could bury it into the 1500* mark and make my ECT gauge fluctuate faster than the speedometer, but it never puked its coolant.

The lift kit did wonders with the looks along with the 315's but killed the fuel milage. Mine would be in the low 20's average (I drive a lot of highway) but now 17 is a good day.

A TxC CAI may be next for me just for grins as they say it helps cool EGT's and ECT's and most of all, improve fuel milage, so it looks like a no brainer. Just need the $$ laying around.

What have you guys found?

Reineke's Sig:2005 2500HD Silverado LS Duramax/Allison CC/SB -- I think I'm done modding it now...
Reply With Quote
Old 07-31-2007, 11:29 PM



I would have to say the programmer due to the added fuel economy.

TCU Fan's Sig:Our opinions, once meant something, now not so much. Think what you want, but the reason for some change is different then you may realize.
Reply With Quote
Old 08-14-2007, 03:20 PM
tobyk321's Avatar
Diesel Fan


if you want good fuel economy crank that pred all the way up, i can get 25 mpg highway (hand calculated) just be careful not to burn up the tranny

tobyk321's Sig:[SIGPIC][/SIGPIC]2005 lly crew cab long bed, k&n filter, mbrp 4" turbo back (not cat), egr blockoff plate
nitrous, suncoast IV/1056
centerlink and tierod sleeves
efi live by mcrat and team salad
Reply With Quote
Old 08-21-2007, 01:39 PM
RodZZilla's Avatar
WhiskeyRiver took my mind
buying 5 copies for my mother


I would have to say the PPE. Haven't tried the other settings yet. The 90HP really woke it up. Mileage jumped from 18 to 22 hand calc. The 5" MBRP was already on when I bought it, so I can't compare. It sure sounds nice, though.

RodZZilla's Sig:2005 K3500 CCLB. MBRP 5", PPE Hot+2, Retrax Tonneau Cover, N-Fab 6 Step Bars, Toyo 295/17's on 08 Chevy Aluminum Rims, Reese Signature Gooseneck.

Iowa Bombers

Reply With Quote
Old 08-21-2007, 01:45 PM
GRI's Avatar
GRI GRI is offline
Diesel Bomber



All the mods I did have their own perks

the AERO was a good investment and I like the sound.
But the DIABLO programmer was the best overall. Which I am hating to sell.

For the money the ROKK tech was a good one as well. I notices a slight power increase and fuel efficiency increased.

GRI's Sig:08 Ford crew cab, 6.4l high idle mod. That's it for now.
Reply With Quote
Old 08-22-2007, 06:15 PM
RodZZilla's Avatar
WhiskeyRiver took my mind
buying 5 copies for my mother


Originally Posted by GRI View Post
the AERO was a good investment and I like the sound.
Do you have any sound clips? I have been thinking of switching to an Aero. Did you notice any mileage increase?
Reply With Quote
Old 08-27-2007, 08:33 PM
ranger22's Avatar
Diesel Fan



EFI-Live tuning, 4.10's in the rear, CO-PILOT, 5-Star Torque Converter. they all make a huge difference. If you ever want to build your transmission, I can set you up with a killer tune. I've been working on one for a while. Its pretty nice. If you just want a little power and some fuel economy, I've been pleased with Cit's 60Hp tune, but I limped my stock transmission with it.

ranger22's Sig:2005 GMC K2500HD Crew Cab Short Bed
Duramax LLY
-tons of goodies
Reply With Quote
Old 09-24-2007, 06:10 PM
Diesel Fan



I like the twin turbo's now, but my favorite mod when it was stock....Edge box hands down!!

bobo's Sig:05 Duramax "Twin Everything"---Sled Pulling Video---Drag Racing Video---Dyno Video
2007 Vid of my truck

Reply With Quote
Old 09-24-2007, 08:30 PM
redneckbuckeye's Avatar
Diesel Bomber



PPE hot+2 nad I really like my 4" MBRP straight piped exhaust.

redneckbuckeye's Sig:Nate
2006 2500HD LBZ D/A ext cab Greystone metalic- autometer z-series pyro and boost gages- Egr blocked and fingered-BD Max Flow lift pump-PPE HOT+2- turbo back 4" MBRP, with muffler delete pie exhaust(lost kitty )
265/75/16 Firestone destination MTs . Tie rod sleeves
Reply With Quote
Old 09-26-2007, 05:16 PM
GmcLbz's Avatar
Site Sponsor - Upstate Diesel Performance



Boost stick would have to be my best mod for the money!


We carry all major brands, if you don't see it just ask. We carry parts from AFE, Airaid, Arp, Autometer, BD Diesel, Bully Dog, City Diesel, DiabloSport, Diamond Eye, Diprocol, Dynomite Diesel, Edge, Efi live, Fass, Fluiddampr, Hamilton Diesel, Hawk Performance, HTT, Industrial Injection, Isspro, Smarty, Magnaflow, Mbrp, Pacbrake, PDI, PPE, Prw, PML, Pure Flow Technologies, Quadzilla, Recon, RBP, Snow Performance, Southbend Clutch, Stampede, Stanadyne, Steinbauer, Suncoast, Superchips, Titan Fuel Tanks, TS Performance, Vulcan Performance, Valair Clutch and many many more!!!


We are your Diesel Performance Source!
Reply With Quote
submit to reddit

Thread Tools Search this Thread
Search this Thread:

Advanced Search

All times are GMT -5. The time now is 01:13 AM.

Copyright And Legal Notice Links Of Interest

Diesel Bombers ® - All Content Protected Under Intellectual Property Rights Law of Registered Trademarks
Reg. No. 3,494,401 Cls. 100, 101 & 104 Under Int. Cl. 38

Protected by Copyscape Duplicate Content Check