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Howards Cams 138051-09 Big Mama Rattler 1958 - 1965 Chevrolet 348/409 Hydraulic Flat Tappet 1800 to 5600 Camshaft

Lift: .548 / .548, Duration @ .050: 235 / 243, Centerline: 103, Big Mama Rattler, Lopey idle, Street or street/strip, Needs 9.0:1+ compression & 2500+ stall converter.
  • The Big Mama Rattler has a Lopey idle.
  • Designed for Street or Street/Strip applications.
  • Needs 9.0:1 compression and a 2,500+ stall converter.
  • Works best from 1,800 to 5,600 rpms.
  • Made in the USA!
Please Call for Availability


Rattler cams are for street enthusiasts who want the classic exhaust sound but also want true performance to go with it. These camshafts offer performance that just doesnt thump around. They give you the performance and throttle response you expect from a performance cam. Dont let the others fool you, sound is not everything. If you want both sound and performance, you need a Howards Cams Rattler. The best of both worlds. Note: To get the best exhaust note, you should use a good dual exhaust system without a cross-over. A cross-over will add minor performance, but mellow the exhaust tone.


  • 138051-09
  • 138051-09
  • 840793133277
  • Howards Cams
  • New

Shipping Information

  • Item Requires Shipping
  • 11.0 lbs.
  • W2.7500” x H2.7500” x L24.0000”