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OEM L86 (6.2L) Intake Manifold and Throttle Body Swap for L83 (5.3L) Trucks (2014-Up GM Truck)
$328.98
Current Estimated Lead Time: 2 Weeks
- Bolt on application for the 2014 and up, GM Truck with the 5.3L DI Engine!
- Choose from either the standard version or the ported version!
- No tuning adjustments necessary!
- Throttle Body relearn is recommended to reset the learned blade position for idle function. (Done with GM and most scan tools)
Frequently Purchased Together
Throttle Body Gaskets
$10.10
$149.99
$178.99
Induction
$31.82
$578.00
$349.99
Description
Background:
While recently working on a build featuring a 2014 Chevrolet Silverado, Z71, with the 5.3 DI engine, we discovered a significant airflow restriction issue during testing. While undoubtedly delivering great performance in a stock setup, the intake manifold and throttle body on the truck just wasn’t up to par from a performance aspect. We compared the physical dimensions of the intake manifold and throttle body to that from a similar truck equipped with the larger 6.2L engine.
On the 6.2L intake manifold, we noticed that overall, it was larger, the runner ports were larger, and the runners appeared to shorter in length inside the manifold. While initially concerned about the runners fitting the ports on the heads, we discovered that the 6.2L manifold fit perfectly against the 5.3L heads. On the throttle body, there was enough difference to fit the mouth of the 5.3L throttle body inside the 6.2L one!
And so testing began…
The Process:
The truck we were working on was equipped with a GPI 5.3L DI Cam, GPI Ported and Milled Heads, Kooks Headers and Y-Pipe, and a Circle D Converter. Next, we simply swapped the throttle body and intake manifold out with a stock 6.2L throttle body and intake manifold. No additional tuning was done after swapping! It was definitely a tight fit on the factory plumbing to the air box, but nothing a little grease couldn’t manage!
We then tested this setup through several dyno pulls, and observed a nice increase in both RWHP and RWTQ. Additionally, we noticed that the peak HP shifted up roughly 300 RPMs. While this was indeed a nice pickup, we weren’t satisfied.
Next, we began developing a porting process for the 6.2L intake manifold. As you can see below, looking at the bottom of the manifold, the stands are quite large – and restrictive.
After removing the stands, we then began porting the mouth of the manifold and the runners. Once that was completed, similar to our LS3 Intake Manifold Porting, we epoxied the floor of the manifold, and installed thin, aluminum sheets where we had cut the stands out.
The Results:
After completing the porting process on the 6.2L intake manifold, we installed it along with a stock 6.2L throttle body. Once again, no tuning adjustments were made. A few more dyno pulls later, and the results were impressive to say the least…
| Manifold / TB | RWHP | TQ |
|---|---|---|
| L83 (5.3L) Factory Manifold / L83 (5.3L) Throttle Body | 376 | 383 |
| L86 (6.2L) Factory Manifold / L86 (6.2L)Throttle Body | 385 | 389 |
| L86 (6.2L) Ported Factory Manifold / L86 (6.2L) Throttle Body | 393 | 392 |
Reviews (53)
53 reviews for OEM L86 (6.2L) Intake Manifold and Throttle Body Swap for L83 (5.3L) Trucks (2014-Up GM Truck)
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Questions & Answers (82)
Customer questions & answers
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Hello, I have a l86 intake manifold already on my l83. Id like to get your ported one. Do you have them ready to go if I sent mine in for trade? It's my daily driver so need minimal down time If possible.
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Q Hello, I have a l86 intake manifold already on my l83. Id like to get your ported one. Do you hav...... Read more answer nowAsked by on October 29, 2023 8:12 pmA We do not keep these ready to go on the shelf they're all made to order
If I run the ported intake an stock 6.2 throttle body not ported with a cold air intake on a 2020 silverado will I need a tune
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Q If I run the ported intake an stock 6.2 throttle body not ported with a cold air intake on a 2020...... Read more answer nowAsked by on September 26, 2023 8:10 pmA You'll likely need the tune for the CAI before the manifold, we haven't installed one of these or CAI on a 19+ truck
Looking into: OEM L86 (6.2L) Intake Manifold and Throttle Body Swap for L83 (5.3L) Trucks (2014-Up GM Truck) I read your note: “Not legal for use in California or other states with similar laws / regulations”. - Does this mean my truck will not pass typical smog/ registration process if I install this kit? I live in CA. Thx!
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Q Looking into: OEM L86 (6.2L) Intake Manifold and Throttle Body Swap for L83 (5.3L) Trucks (2014-U...... Read more answer nowAsked by on August 10, 2023 12:19 amA We can ship the non modified version of the manifold and stock throttle body just not the ported version. Should still pass smog
I just purchased a 2016 Tahoe LTZ. I'm interested in this swap. I do all my own work so how do I tune the LS2 throttle body after install?
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Q I just purchased a 2016 Tahoe LTZ. I'm interested in this swap. I do all my own work so how do I ...... Read moreAsked by on August 4, 2023 5:13 pmThere are no answers for this question yet. Answer now
DO THIS UPGRADE CAN BE DONE TO A GMC SIERRA 1500 2013 4X4 5.3L OEM L86 (6.2L) Intake Manifold and Throttle Body Swap for L83 (5.3L) Trucks (2013 GM Truck) OR WHICH ONE I NEED ?
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Q DO THIS UPGRADE CAN BE DONE TO A GMC SIERRA 1500 2013 4X4 5.3L OEM L86 (6.2L) Intake Manifold and...... Read more answer nowAsked by on July 10, 2023 7:47 amA Yes you'll need to purchase the 6.2 manifold and 6.2 throttle body and the pcv hose and gasket for the conversion
do y’all have a number that i could reach out too and talk to one of y’all, just have a couple questions
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Q do y’all have a number that i could reach out too and talk to one of y’all, just have a couple qu...... Read more answer nowAsked by on July 5, 2023 11:00 pmA 501-985-4947
I have a 2016 Chevy Tahoe 5.3L 4x4 that is not a flex fuel. I am looking to buy an upgraded camshaft and replacing all valvetrain components. I was looking at the DOD delete with a stage 1 TSP cam and upgraded valvetrain parts. Is there a way you can help me with including parts including all necessary gaskets and seals? I am not mechanically incline so I would not know what parts to get.
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Q I have a 2016 Chevy Tahoe 5.3L 4x4 that is not a flex fuel. I am looking to buy an upgraded camsh...... Read more answer nowAsked by on June 16, 2023 11:07 amA Email us at [email protected] so we can better assist you
How long does the porting service usually take once ordered?
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Q How long does the porting service usually take once ordered? answer nowAsked by on March 14, 2023 5:54 pmA It varies depending on work load best to call Zacc in parts and he can give you an eta his ext is 5001A Hello my friend, does this manifold air and throttle fit on a 2018 Chevrolet Suburban exactly?A Hello sir, is this manifold and throttle installed on a Chevrolet Suburban 2018 model, and is it necessary to program the car after installing the manifold?
With the stands removed, and the epoxiedplates installed, has any of them been run with boost? I'd like to do this mod, but planning on 7=10 psi in the very near future and dont want to "blow the welds on the intake.." -dom
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Q With the stands removed, and the epoxiedplates installed, has any of them been run with boost? I'...... Read more answer nowAsked by on February 28, 2023 1:35 pmA I wouldn't recommend boosting the ported manifold
Hello, just ordered the l84 to l86 manifold swap and was wondering of you guys do porting for the l86 throttle bodys.
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Q Hello, just ordered the l84 to l86 manifold swap and was wondering of you guys do porting for the...... Read more answer nowAsked by on December 22, 2022 4:13 pmA We do not
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Excellent
Cheaper than dealer
One of the best purchases I’ve made in upgrading my truck.
Gr8 products nice upgrade
Good parts