When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I bought a set of used rods out of a LQ4 engine (gen3?) and am rebuilding them in my little shop (aka garage) soon to go into a LQ9 / 6.0 build. There is a 6g variance from lightest to heaviest rod in my set. My plan is to buy another set of factory rods and pick the ones closets in weight for my build as these don't have counterweight section on bottom and top of rod.
I search for cast # 3847 GM Rods. There are tons of them for sale. However, there's a difference in their build. I cannot find any used rods that have the little oil relief on the journal like mine. I'm not sure what this even is about. Additionally, my casting has a Txxx and R on it versus the other rods?
7 Most Reliable High-Performance Engines GM Has Ever Built
Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.
Full float factory rods 
