Foothill
← Project Tremor

Build guide · updated 2026-10-14

F-150 Tremor to Raptor: what fits, what it costs, and what stays Tremor

This is a 2023 F-150 Tremor, bought salvage, being taken to a Gen 3 Raptor look in two phases. Most of the change is in how the truck looks. The rear stays Tremor, because the truck's job is towing a 6,500 lb Airstream.

Every part below links to its own decision page: the options weighed, the reasoning, the cost where one is logged, and what has and has not been proven on this truck. Several decisions are still open. Where something is still unknown, the page says so.

Not a full Raptor conversion

The grille, bumpers, fenders, bedsides and lighting take the truck to a Raptor look, and phase two adds a Raptor-spec front end for track width. The rear axle, leaf springs, hitch and trailer wiring stay Tremor. A Gen 3 Raptor's rear is coil-sprung; this truck keeps its leaf springs for towing.

The parts, by phase

Statuses and costs come straight from the decision pages.

Phase one: repair, replace and upgrade

Roadworthy on Tremor underpinnings. The bumpers, grille and lighting carry straight through to phase two; the front suspension and the temporary steel fenders are the two stand-ins.

Phase two: the rest of the Raptor look

The carbon bodywork arrives in spring. The Raptor-spec front end is planned but not yet chosen.

Staying Tremor: the towing side

Not yet placed in a phase

Both still open, like the decisions above marked leaning or still being compared.

The grille went in cleanly

The OEM Gen 3 Raptor grille went into this Tremor cleanly. The active grille shutter, the 360-degree camera and the washer nozzle have to move across from the original grille, and the camera matters most, because it is part of the driver-assist setup.

What is not proven yet is the bumper trim below the grille. It is not on the truck, and that may be where compatibility stops. Owner reports of a no-modification swap are mostly about aftermarket Raptor-style grilles, which are a different part from the factory one.

On this truck the shutter itself was replaced after the crash. The aftermarket unit needed more spline length filed into its drive end before it would seat in the motor.

Decision pages: Gen 3 Raptor grille · Active grille shutter

Bumpers, and the sensors behind them

The front bumper is ADD's Raptor Pro Plus Bolt-On. ADD lists it as keeping the OEM parking sensors and drive-assist features, and also says it obstructs the front camera and drops the factory fog lights and skid plate. Adaptive cruise needs ADD's radar relocation bracket, and the radar needs recalibrating once ride height and bumper position are final.

The rear bumper is ADD's Pro Bolt-On, chosen because ADD publishes that it keeps the factory hitch, trailer harness, reverse sensors and tow hooks. ADD validates it on the Raptor, not on a leaf-sprung Tremor, so its fit stays an open question until it is on. Both bumpers are due in early to mid November.

Decision pages: Front bumper · ACC radar and 360-camera integration · Rear bumper

Fenders, bedsides and the hood

FiberwerX exposed-carbon Gen 3 Raptor fenders and 5.5 ft bedsides are on order together, from one maker in one production run. Carbon weave and clear coat vary between runs, and ordering this way is the most reliable way to get a front-to-rear match. They arrive in spring. Until then the front goes back together on temporary steel fenders, wrapped in white vinyl.

The bedsides are the hardest job on the exterior list. Ford holds the factory aluminum bedsides on with self-piercing rivets and structural adhesive, so every rivet comes out and the bond has to be broken.

The hood is paused. The choice is an OEM Raptor hood or Anderson Composites' carbon one, and it gets made when the carbon panels are here to match.

Decision pages: Raptor-spec front fenders · Raptor-spec 5.5 ft bedsides · Front fenders — temporary steel · Raptor hood

Why phase two needs a Raptor front end

Raptor fenders over a Tremor front end leave a gap that a wider tire does not close. That is why phase two brings a Raptor-spec front end, taken for track width as much as travel, and likely track-width spacers at the rear.

Phase one runs near stock Tremor height. Bilstein's 6112 kit is the current preference, not yet bought, chosen for towing stability and a step-in height low enough for kids and grandparents.

Decision pages: Front suspension

What stays Tremor, and why

The rear is where this stops being a Raptor build. The axle is a used 2023 donor with the same 3.73 ratio and electronic locker (the locker is not yet confirmed working), on new OEM leaf springs and replacement lift blocks, with Bilstein 5100 shocks and a Timbren SES kit for trailer load.

Keeping the leaf springs keeps the towing setup the truck was bought for, and the ADD rear bumper was picked to keep the factory hitch and wiring. The weight-distribution hitch is still undecided.

Decision pages: Rear axle assembly · Rear suspension load support · Cracked rear axle lift blocks · Rear shocks · Rear load support method · Weight-distribution hitch

Lighting

Diode Dynamics Elite Max headlights, amber SS3 fog pods and white SS5 pods in the ADD bumper, and Morimoto XB taillights. The Diode Dynamics parts were bought at a discount, which is disclosed on each of their pages.

Decision pages: Headlight upgrade · Amber bumper pod lights · Bumper-mounted driving lights · Taillight upgrade

What it has cost so far

The parts table shows the logged cost of each part. A few bought parts are not priced here yet, including the Diode Dynamics lights and the FiberwerX panels, so the real figure is higher. The truck itself cost $25,094 delivered; the project page keeps the running total.

Latest photos

All 49 photos

The newest photo from each recent update. Scroll the row, or click one to enlarge it and follow it to the part or journal entry it belongs to.

Front radiator / core-support component
Bolt-on exhaust tip
Passenger exterior mirror
Replacement rear axle assembly
Front left and right steel fenders
Front door shells
Active grille shutter
Stock-style replacement leaf springs
Rear load support method
B8 5100 rear shocks
OEM Gen 3 Raptor grille
XB red-lens taillights
Z36 Truck & Tow pad and rotor kit
FlowFX direct-fit muffler
OEM-style 2.25 in axle lift blocks
Both front doors are on
See all 49 photos →

The full record is on the decision log and in the build journal, including the mistakes.