4" exhuast and Air filter ???'s - Diesel Truck Forum - TheDieselGarage.com
Thread Details Posted by Billysgoat, this thread has received 5 replies and been viewed 1620 times.

LinkBack Thread Tools Display Modes
post #1 of 6 (permalink) Old 07-18-2005, 10:29 PM Thread Starter
Join Date: May 2005
Posts: 3,005
Points: 20,814
Thanks: 0
Thanked 2 Times in 1 Post
4" exhuast and Air filter ???'s

Buddy of mine in the Air Force wanted me to ask some questions for him on his Dmax. He is currently in Stan land and the base puters will not let him on the site :shrug:

1. How easy/hard is it to put an aftermarket 4" exhaust from the turbo back?

2. Does anybody make/know of an aftermarket air filter element similar to the BHAF us Dodge boys use that is available for a Chevy??

Thanks guys
Billysgoat is offline  
Sponsored Links
post #2 of 6 (permalink) Old 07-18-2005, 11:25 PM
Join Date: Jun 2005
Posts: 200
Points: 10
Thanks: 0
Thanked 0 Times in 0 Posts
Not sure what year your buddies truck is but a cat back exhaust is very easy to install. If the truck has a cat then replacing the front pipe will help it some more but if it has no cat the replacement of the front section just does not do a whole lot. It only money though, so if he want todo it all that's fine too. Not sure what a BHAF filter is but the stock duramax filter is good to 500 hp with a clean filter in there. I've run low 12's with stock air filter and box.
Diesel Tech is offline  
post #3 of 6 (permalink) Old 07-18-2005, 11:26 PM
Join Date: Dec 2008
Posts: 329
Points: 710
Thanks: 0
Thanked 1 Time in 1 Post
2 hours max for the exhaust, it's from the front pipe back, not turbo back.
Easiest to make one cut behind the muffler somewhere to remove quickly.

What's a BHAF? Stock filter & swiss cheesing the airbox is the best bang for the buck.
noreaster is offline  
post #4 of 6 (permalink) Old 07-19-2005, 01:15 AM
11 Second Truck Club
Join Date: May 2005
Posts: 397
Points: 3,147
Thanks: 0
Thanked 0 Times in 0 Posts
Send a message via AIM to BMDMAX
BHAF = Big Honking Air Filter. It is a big round element that the Cummins guys can fit under the hood with the I6 engine.

2002 LB7 D/A 2WD. Suncoast Stage V. KD EFILive Tuned, KD N2O, KD 40 Over Injectors, MDP Custom Fuel System, KD MEGA Filter, BD Turbo

2005 LLY D/A 2WD. KD Headlight Booster, KD 4/5 Exhaust, Suncoast Stage V, KD EFILive Tuned.

LB7:[email protected] #2 Only [email protected] #2W/N20
LLY: 471HP & 990 TQ [email protected]

Read about Weekend on the Edge 2005

Truck Website

Chasing 11's Video

Go Fast Goodies Powered by Kennedy Diesel

11 Second 2WD Crew Posse Member!! Got Slicks?
BMDMAX is offline  
post #5 of 6 (permalink) Old 07-19-2005, 01:24 AM Thread Starter
Join Date: May 2005
Posts: 3,005
Points: 20,814
Thanks: 0
Thanked 2 Times in 1 Post
My buddies truck is an 01 CC DRW 4x4 and he was mainly concerned with getting the pipe from the turbo down, so I can tell him to basically not worry about that part??

He wants a BHAF cuz he looked under the hood of my truck and got filter envy :Thumbup:

I will let him know on the stock box mods.
Billysgoat is offline  
post #6 of 6 (permalink) Old 07-19-2005, 01:53 AM
Join Date: Jun 2005
Posts: 200
Points: 10
Thanks: 0
Thanked 0 Times in 0 Posts
Just tell him to get a cat back and save the money. All 2001 had no cat from the factory. If he can jack the truck up about 2 foot of the ground and remove the lower shock bolt he can slide the old exhaust out whole and the new one in. There are four nuts to remove and a few rubber hangers. Pretty simple.
Diesel Tech is offline  
Closed Thread

Quick Reply

Register Now

In order to be able to post messages on the Diesel Truck Forum - TheDieselGarage.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome