Unrivaled Customer Service
And Expert Tech Advice!  
Same Day Shipping Before 11 PM ET
My Cart
Shop By Vehicle
Shop By
Close Menu
Shop By Vehicle
Top Categories
All Categories

Top Categories

All Categories

Free Catalog
E-Mail Signup
My Account
Track Order
Gift Certificates

ProMaxx Performance Small Block Chevy Vortec Cylinder Head & Intake Kit

ProMaxx Performance 2151K1
Easy Kit


jegs shipping Easy Returns
Easy Returns
Lowest Price Guarantee
Lowest Price Guarantee
ProMaxx Performance Small Block Chevy Vortec Cylinder Head & Intake Kit $1,068.08
Small Block Chevy Vortec Cylinder Head & Intake Kit
  • Cast Iron Vortec 185cc Cylinder Heads
  • Cylinder Head Gaskets
  • Cylinder Head Bolts
  • Intake Manifold Gaskets
  • Intake Manifold Bolts
  • Vortec Intake Manifold

  • ProMaxx Performance 2151K1 Details

    Small Block Chevy Vortec Cylinder Heads

    Kit Part Numbers
  • ProMaxx Small Block Chevy Vortec 185cc Cylinder Heads 723-2151
  • JEGS Cylinder Head Gaskets 555-210041
  • JEGS Cylinder Head Bolts 555-83400
  • JEGS Intake Manifold Gaskets 555-210003
  • JEGS Intake Manifold Bolts 555-83201
  • JEGS Vortec Intake Manifold 555-513002

  • Specifications:

    Manufacturer's Part Number:

    Manufactured from cast iron, ProMaxx Performance Small Block Chevy Vortec 185cc Cylinder Heads include 2.02" intake/1.60" exhaust valves, valve springs with .575" max lift for hydraulic flat tappet camshafts or .500" max lift for hydraulic roller camshafts, 3/8" screw-in studs, and guideplates.

  • All New Parts and Castings
  • Accepts Center Bolt or Perimeter Bolt Valve Covers
  • Drilled for Vortec and Carbureted Intake Patterns
  • Large Diameter Spring Pockets
  • Perfect for Street, Strip, or Oval Track Applications
  • Stainless Steel Valves
  • Screw-In Studs and Guideplates
  • Sold In Pairs

    JEGS Easy Kits are designed by JEGS professionals so you get all the parts you need.

  • 2151K1 - ProMaxx Performance Small Block Chevy Vortec Cylinder Heads is rated 5.0 out of 5 by 1.
    Rated 5 out of 5 by from Excellent Combination I run this combination in my 1991 Camaro RS bracket car. The car went from a best of a 13.2 in the 1/4 to a best of [email protected] The car was a consistent 13.7 car before the install, now it's a consistent 12.7 second car. You get exactly what you should out of the product at a super reasonable cost.
    Date published: 2017-11-27
    • y_2018, m_8, d_14, h_24
    • bvseo_bulk, prod_bvrr, vn_bulk_2.0.8
    • cp_1, bvpage1
    • co_hasreviews, tv_0, tr_1
    • loc_en_US, sid_10001_10001_1192189, prod, sort_[SortEntry(order=RATING, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
    • clientName_jegs

    What would be hp gain on stock 350?

    Asked by: 75 corvette
    There are many variables with these kits, but you will typically see a 25-30% increase in HP when using them.
    Answered by: Rusty B
    Date published: 2018-08-08

    I have a 95’ 5.7 TBI. Would this setup work and can I maintain the tbi setup? 

    Asked by: BrianKeeneySR25
    You can, bit it would not be recommended for use with the factory TBI.
    Answered by: Rusty B
    Date published: 2018-03-22

    It says up to 575 lift flat tappet camshaft. What size cam would be best for a .30 over 350 ? It will be used for a oval dirt track race engine.

    Asked by: Dewayne333
    Something near .525" lift in the " Comp Cams Oval Track " series will give you constant power to 6500 rpm. We would need to know a little more about the engine and vehicle setup for a more exact answer 1.800.345.4545
    Answered by: Dean R
    Date published: 2018-01-17

    What's size cam is recommended?

    Asked by: Ivan88
    This cylinder head will be able to work with a flat tappet cam of up to .550" lift, there are many options depending on what your application is.
    Answered by: Rusty B
    Date published: 2018-01-12

    I also have an ‘88, mine is tbi. Will this work with my existing tbi setup? Will an adapter plate be needed?

    Asked by: Phototrekkin
    An adapter is required to retain the TBI , but be advised this will not work on a 305
    Answered by: SteveM
    Date published: 2018-01-23

    I have an 88 tbi 350 I'm planning on running this kit on, what would be a good sized carburetor to run?

    Asked by: Brandon95
    A 600cfm carb would be good to run on this setup.
    Answered by: Jon Jegs Tech
    Date published: 2017-11-17
    • y_2018, m_8, d_14, h_24CST
    • bvseo_bulk, prod_bvqa, vn_bulk_2.0.8
    • cp_1, bvpage1
    • co_hasquestionsanswers, tq_6
    • loc_en_US, sid_10001_10001_1192189, prod, sort_[SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING)]
    • clientName_jegs
    Items You Need
    Some parts are not legal for use in California or other states with similar laws / regulations