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You are here: Home > Pistons > Autotec Forged Pistons > Chevrolet > Chevrolet - 350 Small Block


AutoTec™ Pistons - Pro Quality shelf and custom pistons from concept to reality!


Autotec Series forged pistons for 4.000 bore small block Chevrolet are available in flat top, inverted dome, milled dish designs, or domed configurations. Standard ring packs are 1.5 1.5 3.0 widths with reduced radial dimensions. Wrist pins are .927 diameter by 2.700 long as indicated in the technical specifications, and wire locks, along with oil rail supports (if required), are included. Broached pin-oilers and gas accumulator grooves are incorporated at no additional cost. Domes and combinations not listed are available as a custom piston.




Flat Top
Autotec flat top pistons are manufactured on forged side relief, 4032 low expansion, high silicon material excellent for street or strip applications, fitting most 23° heads. They feature:
  • CNC precision machined ring grooves for 1.5 1.5 3.0mm low friction rings.
  • Top ring land gas distribution grooves serve to enhance performance and improve ring seal.
  • .927 diameter, 2.700 long, 51 series steel wrist pins with pin fit, wire locks, broached pin oilers, and gas accumulator grooves included at no extra charge.
  • Diamond turned skirts.
more info
Dish Top
Autotec dished top pistons are manufactured on forged side relief, 4032 low expansion, high silicon material excellent for street or strip applications, fitting most 23° heads. They feature:
  • CNC precision machined ring grooves for 1.5 1.5 3.0mm low friction rings.
  • Top ring land gas distribution grooves serve to enhance performance and improve ring seal.
  • .927 diameter, 2.700 long, 51 series steel wrist pins with pin fit, wire locks, broached pin oilers, and gas accumulator grooves included at no extra charge.
  • Diamond turned skirts.
more info
Dome Top
Autotec domed top pistons are manufactured on forged side relief, 4032 low expansion, high silicon material excellent for street or strip applications, fitting most 23° heads. They feature:
  • CNC precision machined ring grooves for 1.5 1.5 3.0mm low friction rings.
  • Top ring land gas distribution grooves serve to enhance performance and improve ring seal.
  • .927 diameter, 2.700 long, 51 series steel wrist pins with pin fit, wire locks, broached pin oilers, and gas accumulator grooves included at no extra charge.
  • Diamond turned skirts.
more info