De mandate exhaust Ideas

[SemiSweet]

Hi guys thought I would share some exhaust ideas for anyone looking for an alternative to hollowing out the factory aftertreatment systems.

Three trucks we recently did:
2015 pete 389 short nose - factory exhaust goes above the frame.



This one was the easiest. 5" 45 deg piece on the top side. 5" 90 deg on the bottom. Welded factory style marlon fittings on the inlet and outlet sides so we could use factory clamps. Muffler is 22" full length with an internal baffle. Once I am done replacing my cam, I am going to experiment with the muffler by pounding extra holes through the baffle to get the sound I want and to see how much if any backpressure is created. The muffler has no packing in it just a center baffle. It is quiet with no extra holes.

2010 Kenworth t880 - This truck was the most challenging as the DPF cannister has two outlets. Lots of cutting and test fitment.



We custom built the outlet Y pipe with two 90 Deg exhaust pieces and welded marlon fittings into them. For the inlet, we used a 90 Deg piece with a marlon fitting. The same 22" muffler was used. We were limited for total length available so we had to trim the inlet and outlet of the muffler as well as the other pipes to get it right. On this muffler we pounded several holes through the baffle which gave it a little more sound.

2012 Kenworth T880 - this truck was similar to the Pete.



Used the same muffler with a 90 Deg piece on either side with marlon fittings and clamps. Had to cut the outlet 90 down and angle it a bit to bring the total length down.


The systems on all trucks were fully functional with no codes present before removal. For some reason in the future if we need to reverse this process everything can be re-installed and factory calibrations downloaded back into the trucks. New DPF and SCR units would be BIG $$ to replace if ever needed.

90 deg and 45 deg pipes were about 45$ CAD each. Mufflers were 120$ CAD each. The killer was the marlon fittings which were like 60$ CAD each just robbery$$ here out in the north. Around 350$ per truck assuming you have the tools to do this yourself.