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Edelbrock Adjustable Dual Feed Line Kit
Part No. 8101
Summit Racing Equipment Retail Price: $51.95

As we mentioned earlier, Edelbrock acquired Russell back in 2001. Knowing this we were not surprised to find the Russell name engraved in the fittings used on the Edelbrock Adjustable Dual Feed Line Kit. Like the Russell unit we reviewed, Edelbrock 8101 requires changing out your standard Holley fuel inlet fittings. The line is adjustable thanks to the AN look-a-like hose clamps and 3/8"
braided hose. Edelbrock 8101 requires that you purchase a 3/8"
NPT-to-hose barb or a 3/8" NTP-to-AN fitting to accommodate your
application. The line also has a 1/8" NPT fuel pressure gauge
provision. Considering this part probably shipped from the same QS9000 manufacturing facility that the Russell Pro Street Fuel Kit shipped from, we figured we'd better take a closer look. Here's what we found.

What's in the package? If Edelbrock owns Russell and Russell includes installation instructions with their fuel lines, then wouldn't you think you'd find some paperwork within the Edelbrock package?
The Edelbrock 8101 uses the same aluminum inlet fittings that we showed
you during our inspection of the Russell Pro Street Fuel Kit.

Again, we discovered the initial threads on the inlet side to be pretty
rough. This one almost looked used even though it was fresh from the blister pack.
The main NPT inlet looked well-tapped and burr-free.

In order to make this unit adjustable, the Edelbrock 8101 uses the infamous
AN look-a-like hose covers with hidden clamps.
We loosened the clamp to inspect the sealing area.

Low pressure or not, anytime you clamp rubber line to hard-line it is
best to create a bubble flare to locate your hose and prevent slippage.
The Edelbrock 8101 does not incorporate a flare in their
aluminum tubing on this unit. This is why FordMuscle recommends scrutinizing all "universal" or multi-application performance parts you might be considering.
Here's an example of what any major automotive manufacturer does to hardline designed for rubber hose and a hose clamp. Note the bubble flares, should the performance aftermarket offer anything less?

We measured the primary leg's fuel outlet. It came in at .265". A good match, only .010" smaller than the stock Holley steel inlet fittings.
The flexible nature of the kit made for an easy installation.

Keep it or Return it?
Return it. The Edelbrock Adjustable Dual Feed Line Kit is obviously for those who want the "AN look" without the expense or tools required for a proper AN setup. Again, we're not suggesting that you have to run an AN-set up, it's just that this fuel line reminds us of an Ashlee Simpson video.... pure symbolism over substance. Don't worry, if you run an Edelbrock 8101 we can shamefully admit that we've had them on a few FordMuscle project cars.


Holley Adjustable Chrome Fuel Line
Part No. 34-1
Summit Racing Equipment Retail Price: $58.69

There was no doubt, our expectations were high for any dual feed line offered under the name of the company that designed the test carburetor. Actually, the Holley Adjustable Chrome Fuel Line was the first of two Holley lines we chose for our evaluation. This one being the adjustable variety. By incorporating a crush-type seal, the all steel line can be used for both 4150 and 4160 model carburetors. The main fuel inlet is 1/4" Female NPT and it is tapped for a 1/8" NPT fuel pressure gauge. Let's take a detailed look.

As you can see, the Holley 34-1 is a two-piece design. The line came with some precautionary installation instructions which we expected at almost $60.
The flares were true but we frowned on the fact that both outlet fittings
had the threads chromed.

The main inlet was threaded cleanly. This Holley unit uses a 1/4" female NPT. In our opinion, an inverted flare inlet is preferable but fittings are not always available locally.
We measured the inner diameter of each outlet leg. They both measured .290".

Installation was straight forward. The "crush seal" design was easier to accept than the hose clamp and unflared tubing used in the
Edelbrock adjustable line. We added the fitting to the secondary leg.
Next, we inserted the crush seal into the back of the main fuel inlet.

We inserted the secondary leg into the back of the main fuel inlet and adjusted the assembly to fit the 9-7/16" distance between fuel inlet centers.
Once the proper distance was determined we tightened down the adjustment fitting to crush the seal and lock in our spread. The line was now ready to be installed on the carburetor.

Keep it or Return it?
Return it. For an adjustable dual feed line, the Holley Adjustable Chrome Fuel Line was an acceptable unit. Functional and well-integrated, we felt the line would have been worth the $60 only if the inlet fitting threads were unchromed and the main inlet used an inverted flare rather than NPT.


Holley Chrome Fuel Line
Part No. 734-4
Summit Racing Equipment Retail Price: $41.39

The final fuel line of our evaluation was also the second Holley unit we inspected. The 734-4 is of the one-piece nonadjustable variety. Although there is no information for the 734-4 on the Holley corporate website, the Holley Fuel Line (Part No. 34-150) is identical except that it offers a fuel gauge provision. The apparently conscientious manufacture and packaging of the 734-4 fuel line met our high expectations for Holley.

At first glance the Holley 734-4 does not appear much different than the Trans-Dapt 2197. A detailed view of the Holley part proves otherwise. The quality of flares, tubing bends, lack of chromed threads, and perfect distance between centers for our application, made this our favorite line of the five we reviewed.

What's in the package? This simple, one-piece design doesn't require much. Of the three steel lines we reviewed however, it was the only one that came with protective caps for the inlet threads. The Holley 734-4 also came with instructions.
After removing the protective caps it's easy to see why they were used. Of the three steel lines we reviewed, these had the nicest flares. Intelligently, Holley made sure not to chrome the flares or the fitting threads.

Here's another view of the flare quality. You'll see they are perfectly round and have a consistent angle.
The Holley 734-4 uses a 5/8-18" inverted flare inlet instead of "caveman-like" NPT.

At .285 inches, the inner diameter of both outlets on the Holley 734-4 measured a fraction of an inch larger than the Holley float bowl inlet fittings.
Other Dual Feed Lines in this comparison could have used the "Inspect For Metal Burrs" statement which is included on this Holley 734-4 instruction sheet. Ironically, the Holley piece was absolutely clean of any shavings or burrs.

Installation is very easy for the Holley 734-4. We began by removing both protective caps.
The distance between centers was dead-on as evidenced by how easy we threaded the line into both bowls.

We got the feeling we were not marring any threads and obtaining a perfect seal when putting the final twist on the Holley 734-4

Keep it or Return it?
Keep it. If you're not going to run an AN setup, the Holley 734-4 is our recommendation. The no frills design, application specific aspect, and quality manufacture of this dual feed line make it the right choice for a budget-minded enthusiast. In a world where performance parts can be over-engineered or manufactured carelessly, sometimes a simple part produced sensibly is the best option.


(Build Your Own Dual Feed Line)
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