Jeep J20 Performance Engines

Your One-Stop Shop For Trusted Jeep J20 Performance Engines

If you’re in search of Jeep J20 Performance Engines aftermarket or OEM parts, consider your search over! Advance Auto Parts carries 68 Performance Engines from top brands with prices ranging from $6.49 to $1,414.99.

Beyond great prices, we stock trusted brands manufacturing all types of Performance Engines for your Jeep J20.

And don’t forget to read customer reviews across all Performance Engines categories in our catalog. Buy with confidence by leveraging past customer experiences of our aftermarket and OEM parts.

At Advance Auto Parts, we don’t think top quality Performance Engines have to cost top dollar, and we prove it. Browse our top Jeep J20 Performance Engines below, order online to ship to your home, or head into your nearest Advance Auto Parts location to get started.

Essential Jeep J20 Performance Engines

Edelbrock – RPM AMC/ Jeep Cylinder Head With Exhaust Crossover Complete (Part No.60139)

RPM AMC/ Jeep Cylinder Head With Exhaust Crossover Complete

from

$1414.99
Product Features:
  • Complete Single For Flat Tappet (With Crossover Port)
  • 54cc Combustion Chamber Volume
  • 185cc Intake/70cc Exhaust Runner Volume
  • 2.02 in. Intake/1.6 in. Exhaust Valve Diameter
  • 0.625 in. Deck Thickness
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Competition Cams – VALVE SEALS, TEFLON 3/8" 1 ST (Part No.505-16)

VALVE SEALS, TEFLON 3/8" 1 ST

from

$33.99
COMP Cams offers a complete line of valve stem seals, from the umbrella seals to the positive-stop Teflon seal. These seals are a must to keep unwanted oil from entering the combustion chamber through the clearance in the valve guides. The umbrella seal is normally used when a larger-than-stock diameter spring is used, in the case of a double spring, the positive-stop Teflon seal is used. The umbrella seals require no machining, but with the Teflon seal it is necessary to disassemble the heads and machine the top of the guide with a special .530 diameter cutter. Whenever you are planning an engine overhaul or a cam change, don’t forget the valve seals.

Product Features:
  • Work with .530″ guides and 3/8″ valve stem diameter
  • Valve stem oil seals keep unwanted oil from entering the combustion chamber
  • Several different types of valve seals are offered
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B & M – Torque Converter, Nitrous Holeshot 3000 (Part No.20481)

Torque Converter, Nitrous Holeshot 3000

from

$899.99
Nitrous Holeshot Converters are Built with the same features as the other B&M Holeshots, with the addition of anti-balloon plates. The anti-balloon plates will allow these converters to stand up to the instant horsepower nitrous delivers.

Product Features:
  • 2800-3200 RPM
  • Small And Big Blocks
  • Serious Performance
  • Furnace Brazed
  • Fully Balanced
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Omix – Valve Cover Gasket; 6 Cylinder; 65-80 Jeep CJ/SJ (Part No.17447.02)

Valve Cover Gasket; 6 Cylinder; 65-80 Jeep CJ/SJ

from

$13.29
Is your Jeep’s valve cover gasket leaking? Or, are you rebuilding an engine and need a fresh gasket? Omix-ADA offers high-quality replacement gaskets that will give you years of service and get you back on the road.

Product Features:
  • Cork
  • OE Style
  • Direct Fit
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Edelbrock – Engine Gasket Set (Head / Intake / Exhaust / Valve Cover) for AMC/Jeep (Part No.7372)

Engine Gasket Set (Head / Intake / Exhaust / Valve Cover) for AMC/Jeep

from

$179.99
The Edelbrock #7372?head gaskets provide the best sealing solution and are matched to Edelbrock cylinder heads for optimal performance. Edelbrock relies on industry leading head gasket manufactures to ensure our head gasket sets will provide the best fit

Product Features:
  • Head: 4.275″ Bore/0.045″ Thick/10.60cc Vol.
  • Intake: 1.13″x2.21″ Port/.030″ Thick
  • Exhaust: 1.80″x1.30″ Port
  • 3/16″ Valve Cover
  • Multi Piece Configuration
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Omix – Timing Chain Kit; 5.9L/6.6L; 79-91 Jeep SJ (Part No.17452.08)

Timing Chain Kit; 5.9L/6.6L; 79-91 Jeep SJ

from

$87.99
Timing chains stretch over time. If left untouched, they can begin jumping teeth on the camshaft and crankshaft sprockets. This will change your timing and will do major damage to your Jeep’s engine. It is recommended that you change the timing chain.

Product Features:
  • 3 Piece Kit
  • OE Style
  • Direct Fit
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Omix – Piston Ring Set (Part No.17430.22)

Piston Ring Set

from

$98.99
Are you rebuilding an engine and need a fresh set of piston rings? Omix-ADA offers high-quality replacement piston ring sets from Standard to .080 thousandths over size. They will give you years of service and get you back on the road.

Product Features:
  • .040 Over
  • Engine Work May Be Required To Install This Part
  • Limited 5 Year Warranty
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Omix – Piston Ring Set .030 3.8L/4.2L; 72-90 Jeep CJ/Wrangler YJ (Part No.17430.21)

Piston Ring Set .030 3.8L/4.2L; 72-90 Jeep CJ/Wrangler YJ

from

$111.99
Are you rebuilding an engine and need a fresh set of piston rings? Omix-ADA offers high-quality replacement piston ring sets from Standard to .080 thousandths over size. They will give you years of service and get you back on the road.

Product Features:
  • .030 Over
  • Engine Work May Be Required To Install This Part
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Edelbrock – Pushrod Set for AMC 343-401 (Part No.9637)

Pushrod Set for AMC 343-401

from

$217.99
Product Features:
  • Case-Hardened Tubing
  • Surface Hardening
  • Welded Ends
  • 0.3125 in. Diameter
  • Use with or without Hardened Steel Guideplates
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Omix – Camshaft (Part No.17421.07)

Camshaft

from

$175.99
Direct OE replacement Jeep parts and accessories built to the original specifications by Omix-ADA. Limited five year Manufacturer’s warranty.

Product Features:
  • Made To OE Spec
  • Direct Fit
  • Limited 5 Year Warranty
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Mr. Gasket – High Performance 180 Degree Thermostat for Increased Flow (Part No.4364)

High Performance 180 Degree Thermostat for Increased Flow

from

$29.99
Mr. Gasket High Performance Thermostats are designed to resist large variations of coolant pressure at high RPM (revolutions per minute). This allows them to fully open at correct temperature consistently regardless of engine RPM. The design also provides the high flow that engines operated a higher RPM need. This thermostat also features a copper/brass construction to further resist corrosion. Mr. Gasket High Performance / High Flow Thermostats are suitable for street, drag race, or oval track applications.

Product Features:
  • Opens At 180 Degrees
  • Designed to Resist Large Variations of Coolant Pressure at High RPM
  • Fully Opens at Correct Temperature Consistently Regardless of Engine RPM
  • For High Performance Street, Drag Race, and Oval Track
  • Copper & Brass Construction – Resists Corrosion
  • High Flow
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Mr. Gasket – High Performance Thermostat (Part No.4365)

High Performance Thermostat

from

$31.99
Mr. Gasket High Performance Thermostats are designed to resist large variations of coolant pressure at high RPM (revolutions per minute). This allows them to fully open at correct temperature consistently regardless of engine RPM. The design also provides the high flow that engines operated a higher RPM need. This thermostat also features a copper/brass construction to further resist corrosion. Mr. Gasket High Performance / High Flow Thermostats are suitable for street, drag race, or oval track applications.

Product Features:
  • Opens At 195 Degrees
  • Designed to Resist Large Variations of Coolant Pressure at High RPM
  • Fully Opens at Correct Temperature Consistently Regardless of Engine RPM
  • For High Performance Street, Drag Race, and Oval Track
  • Copper & Brass Construction – Resists Corrosion
  • High Flow
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Mr. Gasket – High Performance Thermostat – 160 Degree Brass & Copper (Part No.4363)

High Performance Thermostat - 160 Degree Brass & Copper

from

$29.49
Mr. Gasket High Performance Thermostats are designed to resist large variations of coolant pressure at high RPM (revolutions per minute). This allows them to fully open at correct temperature consistently regardless of engine RPM. The design also provides the high flow that engines operated a higher RPM need. This thermostat also features a copper/brass construction to further resist corrosion. Mr. Gasket High Performance / High Flow Thermostats are suitable for street, drag race, or oval track applications.

Product Features:
  • Opens at 160 Degrees
  • Designed to Resist Large Variations of Coolant Pressure at High RPM
  • Fully opens at Correct Temperature Consistently Regardless of engine RPM
  • For High Performance Street, Drag Race, and Oval Track
  • Copper & Brass Construction – Resists Corrosion
  • High Flow
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Omix – Rocker Arm Bridge; 258CI; 72-06 Jeep CJ/Wrangler YJ/TJ (Part No.17408.11)

Rocker Arm Bridge; 258CI; 72-06 Jeep CJ/Wrangler YJ/TJ

from

$6.49
Direct OE replacement Jeep parts and accessories built to the original specifications by Omix-ADA.

Product Features:
  • Metal
  • OE Style
  • Direct Fit
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Omix – Water Pump (Part No.17104.12)

Water Pump

from

$90.99
Is your water pump leaking? Over time the rubber impeller will deteriorate. It’s easier to replace it now than to have a roadside breakdown in the future. Get a high quality water pump from Omix-ADA. Keep your Jeep running cool.

Product Features:
  • OE Style
  • Direct Fit
  • High Quality
  • Efficient Cooling
  • Limited 5 Year Warranty
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Omix – Engine Gasket Set; 5.9L/6.6L; 71-91 Jeep SJ (Part No.17440.08)

Engine Gasket Set; 5.9L/6.6L; 71-91 Jeep SJ

from

$175.99
Are your Jeep’s engine gaskets leaking? Or, are you rebuilding an engine and need fresh gaskets? Omix-ADA offers high-quality replacement gaskets that will give you years of service and get you back on the road.

Product Features:
  • Complete Kit
  • OE Style
  • Direct Fit
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Omix – Engine Gasket Set; Lower V8; 72-91 Jeep CJ/SJ (Part No.17442.07)

Engine Gasket Set; Lower V8; 72-91 Jeep CJ/SJ

from

$77.99
Are your Jeep’s engine gaskets leaking? Or, are you rebuilding an engine and need fresh gaskets? Omix-ADA offers high-quality replacement gaskets that will give you years of service and get you back on the road.

Product Features:
  • Full Lower Gasket Set
  • OE Style
  • Direct Fit
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Performance Engines Brands You Can Trust For Your Jeep J20

5 trusted brands of Performance Engines line our shelves, ready to help keep your Jeep J20 running smooth. Below are some of the most popular brands and their top Performance Engines offerings:

Popular B & M Performance Engines

B & M products for the Jeep J20 span several categories. Some of the highest-rated B & M Performance Engines that will fit your Jeep J20 are:
Tork Master 2400
from $373.99
(1)
Tork Master 2400
Performance Torque Converters

Most Purchased Jeep J20 Performance Engines from Mr. Gasket

When you buy the most frequently purchased Mr. Gasket brand Performance Engines, you can be confident it will be the right part for your Jeep J20. Here are the Mr. Gasket Performance Engines Advanced Auto customers buy the most:
High Performance 180 Degree Thermostat for Increased Flow
from $29.99
(20)
High Performance 180 Degree Thermostat for Increased Flow
Performance Engine Coolant Thermostats
High Performance Thermostat - 160 Degree Brass & Copper
from $29.49
(12)
High Performance Thermostat – 160 Degree Brass & Copper
Performance Engine Coolant Thermostats
High Performance Thermostat
from $31.99
This product is not rated
High Performance Thermostat
Performance Engine Coolant Thermostats

FAQs for Jeep J20 Performance Engines

What are the most purchased Performance Engines for the Jeep J20?

Out of 68 Performance Engines for the Jeep J20, the most popular in our inventory are:
High Performance Thermostat
from $31.99
This product is not rated
High Performance Thermostat
Performance Engine Coolant Thermostats
Rocker Arm Bridge; 258CI; 72-06 Jeep CJ/Wrangler YJ/TJ
from $6.49
This product is not rated
Rocker Arm Bridge; 258CI; 72-06 Jeep CJ/Wrangler YJ/TJ
Performance Engine Rocker Arms
VALVE SEALS, TEFLON 3/8" 1 ST
from $33.99
(1)
VALVE SEALS, TEFLON 3/8" 1 ST
Performance Engine Valve Stem Seal Sets

What are the top-rated Jeep J20 Performance Engines?

Top-rated Performance Engines for your Jeep J20 based on customer reviews/ratings are:
Thermostat 180 Degree; 41-71 Willys/Jeep Models
from $8.29
(2)
Thermostat 180 Degree; 41-71 Willys/Jeep Models
“Product is great. Installing next weekend to my jeep”
Engine Gasket Set; Lower V8; 72-91 Jeep CJ/SJ
from $77.99
(1)
Engine Gasket Set; Lower V8; 72-91 Jeep CJ/SJ
“The kit seems pretty well put together, however, the rear main seal is WAY too small for the AMC 360 V8. Pretty disappointed since I am unable to retu”