CP3 Conversion Hardware Kit (No Pump) for 2011-2016 LML Duramax LML These brakes typically use some

These brakes typically use some sort of flapper to close which causes extreme exhaust back pressure to aide in braking

SKU: 67CAIPP

If your engine configuration is exceeding factory RPM limits a Performance Series head with higher valve spring rates is required

the CP4 has proven to be less reliable and less capable than the CP3 used in previous Duramax platforms

5 inch Work Stock Legal

CP3 Conversion Hardware Kit (No Pump) for 2011-2016 LML Duramax LML These brakes typically use someConvert your LML's fuel system from a CP4 to a CP3. Improve your LML Duramax's reliability and fueling capability with a CP3 conversion. Since its introduction, the CP4 has proven to be less reliable and less capable than the CP3 used in previous Duramax platforms. Failures of the CP4 are extremely costly and require replacement of the entire fuel system. Avoid a costly failure down the road and convert your CP4 to a CP3 on the 2011 2016 LML Duramax