MX5 NA/NB LFX Mounting Kit

$1,890.00$1,890.00

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LFX Wiring Harness

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The latest generation of V6 engines from GM has set the bar for performance and efficiency. The LFX is a DOHC 60 degree V6 rated at 320hp and 278lbs-ft and are used in many late GM model vehicles in different variants. With a 7200rpm redline, it matches closely to the Mazda BP engines. Direct fuel injected (flex fuel), and integrated exhaust manifolds should make for a 50 state CARB certifiable conversion. More info on the LFX. Our first thought on the conversion... AWESOME! The car brings OEM driveability with a smooth like stock feeling transmission and 7200rpm redline. The reliable 300+ hp and quick-revving make the car an absolute rocket ship. We were able to knock roughly 35lbs off the factory curb weight and retain a 52/48 distribution. With a baseline tune, the car averaged close to 30mpg round trip. With additional tuning and final adjustments to the intake and exhaust systems, we are confident we can exceed 30mpg for cruising. Part of the trip was working towards meeting California ARB standards. We've made a lot of headway here, and it's looking very positive. Powder coated in silver vain gray. Mounting kits are built to order. Lead times vary, and it is best to contact us for the current lead time.

Additional information

Weight 70 lbs
Dimensions 14 × 36 × 28 in
Generation

NA, NB

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Q & A

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Which transmission is recommended for the Miata NA swap? Can the stock 5 speed be maintained or is the automatic GM required for the pcm/ECU to work? Brianftmfl asked on September 6, 2023

Hello - the swap requires use of the matching GM donor transmission. The stock transmission is not suitable to higher power levels.

V8 Roadsters answered on September 6, 2023
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I have a 2006 cadillac cts with the 3.6 and a manual I'm wondering what all from that car would I be able to use for the swap Conagher Ham asked on April 29, 2023

Hi Conagher - no, that is the earlier version of the GM V6. The correct years for this swap kit are from 2012-2015.

V8 Roadsters answered on May 1, 2023
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Hey is there a way to finance the kit? Thanks! Chris Thompson asked on October 31, 2022

Hi Chris - we offer Paypal payment options that can be selected at checkout.

V8 Roadsters answered on November 1, 2022
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What is the current lead time for this kit? I have an LFX and auto trans out of a 2015 Cadillac rear wheel drive. Scott Wieskamp asked on October 29, 2022

Hi Scott - roughly two weeks at this time. Lead times due vary and typically can become longer during the holiday season.

V8 Roadsters answered on November 1, 2022
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What is included in the kit? Customer asked on August 25, 2022

Hi William - this kit includes the subframe, engine mounts, frame rails, and transmission cross member with poly mount. This kit will bolt the engine and transmission into the chassis.

V8 Roadsters answered on September 8, 2022
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