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Synergy Jeep Heavy Duty Replacement Tie Rod & Drag Link Ends are the exact replacement ends for your Synergy Jeep Steering Kits. Forged housings surrounding fully greaseable, sintered metal on metal bushings provide long-lasting, high performance ends. With studs made from 4140 steel and a larger shank, these rod ends outperform and outlast all other OEM and aftermarket options.

Fitment:

Synergy Part # Fitment Driver Side
Tie Rod End		 Passenger Side
Tie Rod End		 Driver Side
Tie Rod End Boot		 Passenger Side Tie
Rod End Boot
8000-01 JK / JKU Drag Link 4139-L 4131-L 4131-01 4131-01
8002-15 JK / JKU Tie Rod 4139-L 4131-L 4131-01 4131-01
8121-01 TJ / LJ / XJ / ZJ / MJ Tie Rod 4135-L  4135-R 4131-01 4131-01
8121-02 TJ / LJ / XJ / ZJ / MJ Drag Link 4135-L 4137-L 4131-01 4131-01
8155-01 TJ/LJ, XJ, ZJ, MJ Adjustable Front Track Bar 4135-L – 4131-01 –
8800-01 JL / JLU / JT Drag Link 4162-L 4163-L 4131-01 4131-01
8802-01 JL / JLU / JT Tie Rod 4163-L 4164-L 4131-01 4131-01

Tie Rod End Specs:

Part # Description Thread Taper Style
4131-L HD Tie Rod End, Left Hand Thread for JK’s 7/8-18 Left Hand 1:8 Taper (7.125 DEG INCL ANGLE) Standard
4131-R HD Tie Rod End, Right Hand Thread for JK’s 7/8-18 Right Hand 1:8 Taper (7.125 DEG INCL ANGLE) Standard
4135-L HD Tie Rod End, Left Hand Thread for TJ/XJ/ZJ’s 7/8-18 Left Hand 1:8 Taper (7.125 DEG INCL ANGLE) Standard
4135-R HD Tie Rod End, Right Hand Thread for TJ/XJ/ZJ’s 7/8-18 Right Hand 1:8 Taper (7.125 DEG INCL ANGLE) Standard
4137-L HD Tie Rod End, Left Hand Thread for TJ/XJ/ZJ’s 7/8-18 Left Hand 1:8 Taper (7.125 DEG INCL ANGLE) Single Plane
4139-L HD Tie Rod End, Left Hand Thread for JK’s 7/8-18 Left Hand 1:8 Taper (7.125 DEG INCL ANGLE) Single Plane
4161-L HD Tie Rod End, Left Hand Thread for JL 1-14 Left Hand 1:6 Taper (9.5 DEG INCL ANGLE) Single Plane
4162-L HD Tie Rod End, Left Hand Thread for JL / JT Drag Link 1-14 Left Hand 1:8 Taper (7.125 DEG INCL ANGLE) Single Plane
4163-L HD Tie Rod End, Left Hand Thread for JL / JT Drag Link and Tie Rod 1-14 Left Hand 1:6 Taper (9.5 DEG INCL ANGLE) Standard
4164-L HD Tie Rod End, Left Hand Thread for JL / JT Tie Rod 1-14 Left Hand 1:6 Taper (9.5 DEG INCL ANGLE) Single Plane
4166-L Conversion Tie Rod End (Pitman side). Adapts 8000-01 Drag Link for
JL / JT with Ultimate Dana 60 axle housings only.		 7/8-18 Left Hand 1:8 Taper (7.125 DEG INCL ANGLE) Single Plane
4167-L HD Tie Rod End, Left Hand Thread for JL /JT Tie Rod 1-14 Left Hand 1:6 Taper (9.5 DEG INCL ANGLE) Single Plane

Benefits:

  • Engineered with grease grooves in the ball bearings, achieving the longest lasting metal on metal rod end on the market with maximum lubrication and wear resistance
  • Eliminating the nylon ball race allows for a larger ball bearing and increased strength
  • The spring loaded bearing design keeps pressure on the bearings and the joint tight as it wears, preventing premature play
  • Outperforms factory and all other aftermarket style tie rod ends by offering a larger shank with no stress riser (doesn’t neck down at base), preventing premature failure

Features:

  • Fully greaseable sintered metal on metal bushing design has high wear resistance
  • Precision engineered grease grooves in the OD of the induction heat treated ball bearing
  • Ultra-strong forged bearing housing made from 1018 steel
  • Spring loaded bearing design keeps pressure on bearings and keeps the joint tight as it wears
  • Tie Rod End stud made from 4140 steel with an extra large shank
  • Heavy duty nitrile-butadiene rubber (NBR) boots and retaining springs
  • DynaFlo 1/4′-28 straight steel zinc grease zerk fittings with ball check

Notes:

  • These tie rod ends are replacements for Synergy MFG steering bars only – please refer to fitment table to ensure product fitment; They will not replace a factory steering linkage end
  • Synergy High Performance Grease is the recommended grease for this product
  • Single Plane tie rod ends offer misalignment in one direction of movement only. This eliminates drag link flop on the products they are designed for
  • Zerk specs: DynaFlo 1/4′-28 straight steel zinc grease fittings with ball check
4131 Exploded View
413X Exploded View		 Comparison
Comparison		 GM 1 Ton Replacement w/ Nylon Bushing
GM 1 Ton Replacement w/ Nylon Bushing
  
Prop. 65 Warning for California ResidentsMore information: www.p65warnings.ca.gov
4

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Synergy Jeep Heavy Duty Replacement Tie Rod & Drag Link Ends are the exact replacement ends for your Synergy Jeep Steering Kits. Forged housings surrounding fully greaseable, sintered metal on metal bushings provide long-lasting, high performance ends. With studs made from 4140 steel and a larger shank, these rod ends outperform and outlast all other OEM and aftermarket options.

Fitment:

Synergy Part # Fitment Driver Side
Tie Rod End		 Passenger Side
Tie Rod End		 Driver Side
Tie Rod End Boot		 Passenger Side Tie
Rod End Boot
8000-01 JK / JKU Drag Link 4139-L 4131-L 4131-01 4131-01
8002-15 JK / JKU Tie Rod 4139-L 4131-L 4131-01 4131-01
8121-01 TJ / LJ / XJ / ZJ / MJ Tie Rod 4135-L  4135-R 4131-01 4131-01
8121-02 TJ / LJ / XJ / ZJ / MJ Drag Link 4135-L 4137-L 4131-01 4131-01
8155-01 TJ/LJ, XJ, ZJ, MJ Adjustable Front Track Bar 4135-L – 4131-01 –
8800-01 JL / JLU / JT Drag Link 4162-L 4163-L 4131-01 4131-01
8802-01 JL / JLU / JT Tie Rod 4163-L 4164-L 4131-01 4131-01

Tie Rod End Specs:

Part # Description Thread Taper Style
4131-L HD Tie Rod End, Left Hand Thread for JK’s 7/8-18 Left Hand 1:8 Taper (7.125 DEG INCL ANGLE) Standard
4131-R HD Tie Rod End, Right Hand Thread for JK’s 7/8-18 Right Hand 1:8 Taper (7.125 DEG INCL ANGLE) Standard
4135-L HD Tie Rod End, Left Hand Thread for TJ/XJ/ZJ’s 7/8-18 Left Hand 1:8 Taper (7.125 DEG INCL ANGLE) Standard
4135-R HD Tie Rod End, Right Hand Thread for TJ/XJ/ZJ’s 7/8-18 Right Hand 1:8 Taper (7.125 DEG INCL ANGLE) Standard
4137-L HD Tie Rod End, Left Hand Thread for TJ/XJ/ZJ’s 7/8-18 Left Hand 1:8 Taper (7.125 DEG INCL ANGLE) Single Plane
4139-L HD Tie Rod End, Left Hand Thread for JK’s 7/8-18 Left Hand 1:8 Taper (7.125 DEG INCL ANGLE) Single Plane
4161-L HD Tie Rod End, Left Hand Thread for JL 1-14 Left Hand 1:6 Taper (9.5 DEG INCL ANGLE) Single Plane
4162-L HD Tie Rod End, Left Hand Thread for JL / JT Drag Link 1-14 Left Hand 1:8 Taper (7.125 DEG INCL ANGLE) Single Plane
4163-L HD Tie Rod End, Left Hand Thread for JL / JT Drag Link and Tie Rod 1-14 Left Hand 1:6 Taper (9.5 DEG INCL ANGLE) Standard
4164-L HD Tie Rod End, Left Hand Thread for JL / JT Tie Rod 1-14 Left Hand 1:6 Taper (9.5 DEG INCL ANGLE) Single Plane
4166-L Conversion Tie Rod End (Pitman side). Adapts 8000-01 Drag Link for
JL / JT with Ultimate Dana 60 axle housings only.		 7/8-18 Left Hand 1:8 Taper (7.125 DEG INCL ANGLE) Single Plane
4167-L HD Tie Rod End, Left Hand Thread for JL /JT Tie Rod 1-14 Left Hand 1:6 Taper (9.5 DEG INCL ANGLE) Single Plane

Benefits:

  • Engineered with grease grooves in the ball bearings, achieving the longest lasting metal on metal rod end on the market with maximum lubrication and wear resistance
  • Eliminating the nylon ball race allows for a larger ball bearing and increased strength
  • The spring loaded bearing design keeps pressure on the bearings and the joint tight as it wears, preventing premature play
  • Outperforms factory and all other aftermarket style tie rod ends by offering a larger shank with no stress riser (doesn’t neck down at base), preventing premature failure

Features:

  • Fully greaseable sintered metal on metal bushing design has high wear resistance
  • Precision engineered grease grooves in the OD of the induction heat treated ball bearing
  • Ultra-strong forged bearing housing made from 1018 steel
  • Spring loaded bearing design keeps pressure on bearings and keeps the joint tight as it wears
  • Tie Rod End stud made from 4140 steel with an extra large shank
  • Heavy duty nitrile-butadiene rubber (NBR) boots and retaining springs
  • DynaFlo 1/4′-28 straight steel zinc grease zerk fittings with ball check

Notes:

  • These tie rod ends are replacements for Synergy MFG steering bars only – please refer to fitment table to ensure product fitment; They will not replace a factory steering linkage end
  • Synergy High Performance Grease is the recommended grease for this product
  • Single Plane tie rod ends offer misalignment in one direction of movement only. This eliminates drag link flop on the products they are designed for
  • Zerk specs: DynaFlo 1/4′-28 straight steel zinc grease fittings with ball check
4131 Exploded View
413X Exploded View		 Comparison
Comparison		 GM 1 Ton Replacement w/ Nylon Bushing
GM 1 Ton Replacement w/ Nylon Bushing
  
Prop. 65 Warning for California ResidentsMore information: www.p65warnings.ca.gov
4

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Synergy Exhaust Spacer Kit 2.5″+ Lift for 2012-2018 Jeep Wrangler JK

The Synergy 2012 – 2018 Jeep JK / JKU Exhaust Spacer Kit is necessary on any 2012 – 2018 JK with more than 2″ of lift and stock driveshafts. It relocates the factory crossover pipe down and rearwards to allow for additional front drive shaft clearance. A crucial step when installing a lift of any kind, including one of our Synergy Stage Suspension Systems is ensuring there is no clearance issues or binding. Unfortunately, the exhaust tends to be left behind. Prevent unwanted clearance issues with this simple kit!

Part # Description
5017 2012 – 2018 Jeep JK / JKU, 3.6L V6

Benefits:

  • Easy bolt on installation can be done with simple hand tools
  • Exhaust spacer kit is not necessary when using aftermarket drive shafts

Features:

  • Specialty stainless steel exhaust spacers 
  • High quality mounting hardware

Includes:

5017
(1) Long side exhaust spacer

(1) Short side exhaust spacer

(4) M8-1.25 x 85mm long hex head bolts

(4) Flat washers

Synergy Replacement Double Adjuster Sleeve 1.25-12 Threads for 2007-2018 Jeep Wrangler JK

Notes:

  • Spacer kit not always necessary when using an aftermarket driveshaft
  • This spacer kit is an important addition to our Synergy Stage Lift Kits

Installation Instructions

Prop. 65 Warning for California ResidentsMore information: www.p65warnings.ca.gov
9

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Synergy Heavy Duty Sway Bar Links 3.5-6 Lift

Part: 8515-12

Factory sway bar links on Ram trucks allow excessive body roll and limit articulation during off-road travel. These Synergy Heavy Duty Sway Bar Links replace the flexible factory bushings with a spherical bushing and sealed tie rod end for direct, low-friction load transfer. The 1020 CR solid construction and zinc plating resist bending and corrosion while maintaining full suspension movement. These links provide up to 30 degrees of bind free misalignment, preventing preload during articulation.

Features

  • 1020 CR Solid Steel: Resists bending and deflection under heavy load.
  • Spherical Bushing: Provides 30 degrees of bind free articulation.
  • Sealed Tie Rod End: Direct linkages improve sway control and reduce play.
  • Zinc Plating: Enhanced corrosion resistance for long service life.
  • Stem Top Adapter: Eliminates factory pancake bushing failure point.
  • Simple Bolt-On Install: Installs using basic hand tools.

Specifications

  • Lift Range: 3.5 to 6 inches
  • Minimum Collapsed Length: 10 7/16 inches
  • Maximum Extended Length: 11 3/8 inches
  • Material: 1020 CR solid steel
  • Finish: Clear zinc plated
  • Misalignment Capability: 30 degrees

Fitment

  • 2006-2008 Dodge Ram 1500 Mega-cab 4×4
  • 1998.5-2013 Dodge Ram 2500 4×4
  • 1998.5-2013.5 Dodge Ram 3500 4×4

Installation Notes

  • Model year 1998.5-2002 trucks require the Synergy Heavy Duty Steering Kit for clearance:
    8525-02 for 2000-2002
    and
    8525-03 for 1994-1999.
  • To run part 8515-11 on a 1998-2002 Ram, the Synergy spacer kit is required:
    4006-01 spacer kit.
  • Model year 2003-2009 trucks may have passenger side clearance issues if equipped with factory Y-link steering.
  • Some early models may require minor drilling at the axle mount.
  • 2013 Ram 3500 is a split production year. Radius arm trucks must use 2014+ sway bar links.

If you need 0-3 inch lift applications, use: Synergy 0-3 inch links

What’s Included

  • (2) 8515 sway bar links
  • (2) Sealed tie rod end sway bar link ends
  • (2) 851501 stem top sway bar link adapters

Why Choose This Product?

  • Engineering Advantage: Proper spherical joint geometry prevents binding and improves sway bar effectiveness.
  • Performance Benefit: Reduces body roll and maintains stable on-road handling with full suspension travel off-road.

Frequently Asked Questions

Will these replace the factory pancake style bushings?
Yes. The stem adapter eliminates the factory bushing that commonly fails.

Are they compatible with stock steering?
Yes, except some early and Y-link trucks where steering clearance notes apply.

Do they require welding?
No. Installation is fully bolt on.

Do these fit 3.5-6 inch lifts only?
Yes. For 0-3 inch lifts use the dedicated Synergy link kit.

Do I need an alignment after installation?
No. Links do not change steering geometry, but checking alignment is always recommended after suspension work.

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