ARRMA Big Rock 3S V3 · Upgrades
Upgrades for the Big Rock 4X4 V3 3S BLX (ARA4312V3) · not V4/223S that ExactMods has on record. Each one links to the source behind its fitment. Parts that still need a revision check are marked. Read the notes before you buy.
5 upgrade records · sources cited on every part · All Big Rock 3S V3 parts
RPM · RPM80762
Durability upgrade
Replaces OEM AR330543
RPM replaces AR330543 and flags Big Rock variation by installed OEM arm number. Source also lists: Typhon 3S.
Important note
Confirm AR330543 is installed; older Big Rock variants may use Granite arms. Supporting parts: Verify installed OEM arm number.
Confidence: High
Verified Sep 28, 2026
Last seen: $12.49
Price and availability may have changed.
RPM · RPM80842
Durability upgrade
Replaces OEM ARA330540
RPM replaces ARA330540 and cautions Big Rock owners to verify the installed arm. Source also lists: Typhon 3S.
Important note
Older Big Rock variants may use Granite arms. Supporting parts: Verify installed OEM arm number.
Confidence: High
Verified Sep 28, 2026
Last seen: $12.49
Price and availability may have changed.
Integy · C28854
Steel CVD upgrade
Replaces OEM AR310780; AR310864
Manufacturer explicitly lists ARA4312V3 and replacement of stock front/rear shafts; sold as a pair for either end. Source also lists: Granite ARA4302V3; Senton ARA4303V3; Typhon ARA4306V3.
Important note
Two pairs needed for a complete chassis. Supporting parts: Second pair for all four corners.
Confidence: High
Verified Sep 28, 2026
Price not captured
Price and availability may have changed.
Pro-Line · PRO637500
Adjustable upgrade
Retailer explicitly supports Big Rock, Granite and Senton 4x4. Source also lists: Granite 3S; Senton 3S.
Important note
Exact V3 product code not stated. Supporting parts: Alternate body shell as applicable.
Check your revision
The source does not confirm the exact ARA4312V3 revision. Read the note and check your model before buying.
Confidence: Medium-High
Verified Sep 28, 2026
Last seen: $14.99
Price and availability may have changed.
ARRMA · AR310904 + AR310905 + AR310906
Conversion
These three components appear together at each corner in the Big Rock V3 exploded view; retailer describes them as the parts needed for a 17mm conversion and names Big Rock, Granite, Senton and Typhon. Source also lists: Granite 3S; Senton 3S; Typhon 3S.
Important note
Four corners require two packs of two hexes and axles plus one four-nut pack; verify desired wheel offset. Supporting parts: AR310904 hexes, AR310905 axles, AR310906 nuts; quantities for four corners.
Confidence: High
Verified Sep 28, 2026
Price not captured
Last seen status: Mixed stock by component
Price and availability may have changed.
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