What Is Ultimate Duty?

Manufactured exclusively for MAPerformance by Howards Racing Components we developed these connecting rods to fulfill the needs of the hardcore enthusiast. Designed to handle 1000+ horsepower in a 4 cylinder application these truly are ultimate duty connecting rods!

Research & Development

The research phase for these connecting rods consisted of a process called Finite Element Analysis which helped us to determine the weakest points of the factory connecting rod design. Using that information we developed a prototype using state-of-the-art CNC equipment that included the finest high nickel AQ4340 billet steel material, Ampco 18 bronze wristpin bushings, Manton alignment sleeves, and massive 7/16" ARP 2000 series fasteners. In the final development phase the prototype was heat treated, fully stress relieved, and shot peened to ensure that no stress risers or surface imperfections remain. The end result: A 652 gram connecting rod that we feel is the strongest and most reliable steel connecting rod available on the market for this application.

Important Note: In order to increase bearing surface area and load capacity these connecting rods utilize rod bearings from the 1990-1992.5 6 bolt 4g63 (ACL Part # 4B1146H).

Guaranteed Unbreakable

We are so confident that these connecting rods will not bend or break that we are willing to guarantee it! If you bend or break one of these connecting rods from shear power we will reimburse you 100% of the purchase price.

Of course there are some stipulations with this guarantee as we simply cannot reimburse failures resulting from detonation, overheating, and/or lack of oiling. If you do manage to bend or break these bad boys we will need to see the rest of your engine components so that we can determine the cause of the failure! All reimbursements will be made at our discretion.

Want some proof?

 

These sound very good I'm gonna use them for my motor build will be calling you guy's up soon!

 

We use them in our race car that went 8.41at161 and makes over 1000whp. Let me know and I can get you some at good deal.

Kasey

 

^Nice thanks, I'm actually leaning towards your MAP Stage 2 shortblock now i'll give you guy's a call when it's time for me to pull the trigger gonna be doing a special build here in the west coast.

 

Give me a ring when your ready. Im sure we can get you the best deal and the best parts on evom.

Kasey

 

Does it matter which way the rod is oriented on the crank - ie, bearing tangs facing intake or exhaust side?

 

Our rods are not directional. Though we using face the words towards the front of the block for pet peeves.

 

Pet peeves are important around here.

 

Do these rods only come in one size? I want to use them in a 2.2 build down the road.

 

At this point only standard size rods are available that work with 2.0l / 2.3l / 2.4l applications. We are looking into 156mm rods in the near future...

 

curious if the stage 2 2.4L option for these rods are LR?

 

We offer both standard 150mm and 156mm options

 

Saturday morning bump!

 

Bumptizzle!

 

Definitely good bang for the buck ordering a set for use in my dsm