If you use a Jacobs/Ram Brake on your engine, you MUST change to the 60-lb. exhaust valve springs. I don't know what is recommended with other brakes. I get very good braking with my Jacobs/Ram brake and would recommend it.
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1996 Dodge 2500 4X4 SC, SLT, Cummins 12V, 5-spd. , JRE 4" exhaust (my kitty ran off into the woods and the muffler fell off!), TST 280 HP/685 Ft-Lb Uprate Kit, AFC Spring Kit, Horton Fan Clutch, Jacobs/Ram Exhaust Brake, MagHytec Differential Cover, Prime-Loc, Rancho RS9000 Shocks, Combo Gauge, K&N Filter, Brite-Box, Geno's finger-touch oil pan drain plug, no turbo silencer ring, full-time fog lights.