Sorry, can't give you the right part number, but can confim that CIPA are the ones to use. I've had them for 5 years now, and am very pleased with them.
1997 Chevy K2500 E/C Auto - K & N Filter, 3" exhaust, no cat. Midas Flowmaster muffler, Kennedy ECM, Peninsular Diesel Marine upper intake manifold, 3-gauge 'B' Pillar gauge pod, Autometer Phantom gauges, Boost, EGT, and Tranny temp. Homemade air/air intercooler setup, with puller fan. Phazer Gear timing, Fluidampr harmonic balancer, 250,000 kms.
2009 25' Springdale 5th wheel trailer
1978 Z28 4sp Camaro (in middle of restoring it)
1963 Dodge 2 dr. Hdtp., Model 440 (will be a Max Wedge clone)
1979 GL1000 (Honda Goldwing)