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ProMaxx Performance 2171 - ProMaxx Performance Small Block Chevy Aluminum Cylinder Heads



ProMaxx Performance 2171 - ProMaxx Performance Small Block Chevy Aluminum Cylinder Heads
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Product images may differ from actual product appearance.

JEGS Part Number: 723-2171

185cc Aluminum Cylinder Heads
  • Small Block Chevy
  • 2.02''/1.60'' Valves
  • 185cc Intake Runner
  • 72cc Combustion Chamber
  • Straight Plug
  • Assembled
  • Sold as pairs
  • $815.00
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    ProMaxx Performance 2171 - ProMaxx Performance Small Block Chevy Aluminum Cylinder Heads Details

    185cc Aluminum Small Block Chevy Cylinder Heads

    Technical Specifications and Recommended Components:
    Combustion Chamber - 72cc
    Weight - 55.00 lbs
    Intake Runner - 185cc
    Exhaust Runner - 62cc
    Intake Valve Size - 2.02"
    Exhaust Valve Size - 1.60"
    Max. Valve Spring Lift - .575" Hydraulic Flat Tappet
    Spring Pressure - Closed 115 lbs. @ 1.800", Open 315 lbs. @ 1.225"
    Valve Seal Material - Viton
    Valve Guide - Manganese Bronze
    Retainer Material - Steel
    Valve Job - 5-angle
    Head Bolts - ARP 070-134-3601
    Valve Spacing - OEM
    Valve Seats - Hardened Steel
    Intake Gasket - Fel-Pro 375-1206 or 375-1266
    Exhaust Gasket - Fel-Pro 375-1405
    Head Gasket - Fel-Pro 375-1004 or 375-1094
    Spark Plug - 750" Reach Gasket Seat

    Specifications:

    Accessory Bolt Holes Drilled
    Yes
    Calculator
    Compression Calculator
    CNC-Machined Combustion Chamber
    No
    CNC-Machined Exhaust Runner
    No
    CNC-Machined Intake Runner
    No
    Combustion Chamber Volume (cc)
    72
    Cylinder Head Finish
    Natural
    Cylinder Head Material
    Aluminum
    Cylinder Head Style
    Assembled
    Damper Spring Included
    Yes
    Exhaust Port Location
    Standard
    Exhaust Port Shape
    Square
    Exhaust Runner Volume (cc)
    62
    Exhaust Valve Diameter (in.)
    1.6
    Exhaust Valves Included
    Yes
    Guideplates Included
    Yes
    Heat Crossover
    No
    Intake Port Location
    Standard
    Intake Runner Volume (cc)
    185
    Intake Valve Diameter (in.)
    2.02
    Intake Valves Included
    Yes
    Lock Style
    Stock
    Locks Included
    Yes
    Machined for O-Ring
    No
    Maximum Valve Lift (in.)
    0.575
    Oiling Style
    Through pushrod
    Outside Diameter of Outer Spring (in.)
    1.27
    Quantity
    Sold as a pair
    Retainer Material
    Steel
    Retainers Included
    Yes
    Rocker Arm Nuts Included
    No
    Rocker Arm Studs Included
    Yes
    Rocker Arms Included
    No
    Spark Plug Style
    Straight
    Steam Holes Drilled
    No
    Valve Cover Mounting Style
    Perimeter bolt
    Valve Guide Material
    Manganese bronze
    Valve Guides Included
    Yes
    Valve Seat Machine Style
    5-angle
    Valve Seat Material
    Ductile iron
    Valve Seats Machined
    Yes
    Valve Springs Included
    Yes
    Valve Stem Seals Included
    Yes
    Manufacturer's Part Number:
    2171

    The ProMaxx Performance Small Block Chevy Cylinder Heads are manufactured from cast aluminum and are offered with straight or angled spark plug ports, a variety of intake port runner, combustion chamber and valve sizes to work on all of your performance engine builds from mild to wild!

    Features
  • All New Parts and Castings
  • Accepts Perimeter Bolt Valve Covers
  • Stainless Steel Valves
  • 3/8" Screw-In Studs and Guideplates
  • Sold In Pairs
  • Assembled in the USA

  • 2171 is rated 2.0 out of 5 by 1.
    • 2016-06-27T11:45CST
    • bvseo_cps, prod_bvrr, vn_cps_3.2.1
    • cp_1, bvpage1
    • co_hasreviews, tv_0, tr_1
    • loc_en_US, sid_10001_10001_1246233, PRD, sort_relevancy
    • clientName_jegs
    Rated 2 out of 5 by from Bad quality I bought the heads a month ago and installed them. These are on my Chevelle that I do not drive much. There is only a 3 month warranty which I feel shows how this manufacturer feels about their product. After about a half hour of warming the engine up, I backed the car out of the garage and noticed coolant starting to come out of the right side exhaust. I quickly pulled the car back into the garage and shut it down. At this point the coolant was steadily coming out of the exhaust like a garden hose running about 1/2 flow. I immediately removed the spark plugs and found no. 4 coolant pouring out. I removed the head and found a bb sized hole in the combustion chamber casting. I was told they were sold as a set so I needed to return them both for warranty which I did not feel comfortable leaving the other one on any way. When I called tech support before disassembling the head, they mentioned possibly a bad casting which leads me to believe they have had some bad castings in the past. Needless to say I have more down time and am missing a few car shows. I am displeased that they might know of the issue and still send out a bad quality product which in turn cost me quite a bit of time in the shop and more money in parts. I should have just spent the extra money in the first place and bought a better brand. I would have thought jegs would not sell this type of quality.
    Date published: 2015-06-04
    • 2016-06-27T11:45CST
    • bvseo_cps, prod_bvrr, vn_cps_3.2.1
    • cp_1, bvpage1
    • co_hasreviews, tv_0, tr_1
    • loc_en_US, sid_10001_10001_1246233, PRD, sort_relevancy
    • clientName_jegs
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