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Durafit C20-0003 DOC for Cummins ISM 496524NX 5287191NX A035G674 Q621301

SKU C20-0003(01

At this time California law only 
allows OEM Diesel Particulate 
Filters to be sold in state, not 
aftermarket. Any sales to 
California will be canceled and 
refunded. No exceptions!

Durafit P/N C20-0003 

New outright DOC, not cleaned or 
remanned. No core charge.

Gaskets and clamps included.

Cummins ISM

496524NX 5287191NX 
A035G674 Q621301

3 Year Warranty.

Durafit is a division of AP Exhaust 
/ DieselTech, who has been in the 
exhaust business since 1927. 

DuraFit™ diesel particulate filters 
(DPFs) and diesel oxidation catalysts 
(DOCs) combine strengthened designs 
with upgraded materials – providing 
durability to dramatically extend 
service life over OEM units.
• High-grade stainless steel canisters 
improve durability and resist corrosion
• Advanced SPGM™ coating on DOCs 
provides efficient catalyzation and
• 100% new, genuine OEM substrates 
reduce backpressure
• Stringent testing ensures performance 
that meets or exceeds OEM standards
• Backed by a nationwide 3-year, 
unlimited mileage warranty

OEM-Style Fit for Quick Installation!
To get your equipment back to work 
quickly, DuraFit products fit just like 
OEM units, meet or exceed OEM emissions 
requirements and are fully supported by 
our field application specialists.
• Exact-fit OEM replacement units 
complete with installation gaskets
• Complies with emissions requirements 
for 2007 and newer model years
• Approved for horizontal, vertical and dual 
• Nationwide technical / installation support

DuraFit replacement DPFs and DOCs are 
fully-compatible with existing OEM units.

Beware of cheap imported DPFs! We've 
spoken to sellers in Asia who were 
unaware that the ceramic honeycomb 
substrate must have a catalytic coating 
to work correctly (At high temperatures, 
toxic gases such as nitrogen oxides and 
carbon monoxide in the exhaust come 
into contact with the catalysts and are 
converted into harmless nitrogen and 
water and less harmful carbon dioxide).
Incorrect size honeycomb substrates in
cheap imported DPF's will also increase
backpressure on the engine, causing
fuel economy and emissions problems.