⚙️ Measure Like a Pro, Build Like a Boss
The Proform 66788 Rod Bolt Stretch Gauge is a precision tool featuring a 0.001" dial indicator designed to measure rod bolt stretch accurately. Adjustable for bolts up to 2.75" long, it uses manufacturer stretch factors to ensure proper torque preload, making it an essential gauge for engine builders seeking reliable, professional-grade results.
| ASIN | B000CCG1E0 |
| Best Sellers Rank | #212,882 in Automotive ( See Top 100 in Automotive ) #4 in Automotive Performance Gauge Sets #787 in Automotive Replacement Instrument Panel Gauges |
| Brand | ProForm |
| Customer Reviews | 4.4 4.4 out of 5 stars (89) |
| Date First Available | September 14, 2004 |
| Exterior | Smooth |
| Global Trade Identification Number | 00037995667888 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 7.2 ounces |
| Item dimensions L x W x H | 144 x 72 x 24 inches |
| Item model number | 66788 |
| Manufacturer | Proform |
| Manufacturer Part Number | 66788 |
| Material | Aluminum |
| Model | Rod Bolt Stretch Gauge |
| OEM Part Number | 66788 |
| Product Dimensions | 144 x 72 x 24 inches |
| UPC | 037995667888 |
A**R
Accurate and Affordable
Great tool for occasional builds. Measures rod bolt stretch precisely and fits bolts up to 2.75”. A bit flimsy on longer bolts, but solid value for the price.
A**V
As ordered
A good tool to do build engines the right way
B**W
Good
Good mine was missing the bottom pin.. so couldn't really use it. Had to borrow one.
J**.
Needs a little more spring pressure
The tool works if you have the room to hang it upside down letting it have from the bolt, but if you add a small spring it works great.
J**T
Fits in tight spaces, worked awesome on my V-ROD engine
Well made
A**R
Inaccurate measurements due poor craftsmanship 👎.
Inaccurate measurements due to oversized I.D of housing hole for dial indicator gauge. 👎
T**E
You get what you pay for
Kind of a piece of crap but you get what you pay for, the C shaped part was visibly warped when it arrived, and not from any physical trauma, just bad QC. It work, is accurate enough, and it was cheap so I can't complain too much.
H**R
Cheap but it works.
The spring is very weak. The plunger doesn't move very smoothly and needs "help" to extend. You get what you pay for.
P**B
In a high volume shop where your building many engines a month you may want a better quality. But for infrequent use it does the job, it is accurate. I don’t have any trouble with it. If you’re not patient taking measurements even the best quality will not work for you.
J**N
I was a little worried with some of the reviews on here, but it works brilliantly for half the price of others. I would strongly recommend it.
K**Y
Inaccurate after comparing with my arp one
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