Straight pipe New Hampshire

jbr89

New member
Mar 11, 2015
1
0
0
My friend just bought a 06 duramax. We were wondering if it's allowed to straight pipe his truck in New Hampshire with out getting in trouble.?
 

duramax05blk

Member
Mar 16, 2012
138
0
16
Been straight piped in nh for 5 years no problems. but my 4cyl Kia got me a loud exhaust warning. On a side note I have a stock front pipe that's been deleted in southern nh
 

c20elephant

C20ELEPHANT
Apr 25, 2013
2,065
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Phoenix, Arizona
Do you have emissions inspections where you live, if so they will be looking for the DOC/Catatlytic converter and a few other items. The link below states what I have to though every year and I kinda sorta have a DOC for visual inspection. It is my understanding after several calls to Magnaflow and speaking with two different guys in the tech department that the OEM DOC/catalytic converter flows better than what we are lead to believe, the OEM muffler is the largest restriction on the stock exhaust.

DOC=Diesel Oxidation Catalyst


http://www.azdeq.gov/environ/air/vei/diesel.html