OEM spark plug specifications

Tags: #spark-plug · #torch · #part-number · #ignition

OEM part. The factory spark plug for this engine (Mazda LFF7-derived) is Torch QH5RTIP(-13) — an iridium + platinum composite-electrode design, confirmed against the 2023-2024 Torch catalog and visually by the presence of a platinum "pad" on the electrode under close inspection ^{1 23}. Gap specification: 1.3mm per the current catalog ⁴ — note an older/different Torch source lists a 1.1mm gap, so double-check which catalog revision applies before gapping a replacement ⁵. Thread size 14x1.25, length 25mm, 16mm hex socket (per the candidate's mechanical spec, consistent with the standard OEM plug size for this engine family).

Naming/nomenclature confusion — buyer beware. There is no confirmed "QH6RTIP" plug in Torch's catalog for this engine — only QH5RTIP(-13); requests for a "6" variant in the RTIP line came back empty, and RTIP as a design generation is described as already superseded ¹. A separately-referenced Wildberries listing, ostensibly for the OEM equivalent, actually pictured RIU-11 plugs rather than RTIP-13 — RIU appears to be a newer design-generation suffix replacing RTIP, but it is not confirmed to be a drop-in match for this engine's spec sheet ⁶. Bottom line: verify the exact suffix (RTIP vs RIU) and index number against the current Torch catalog for your engine variant before ordering, rather than trusting a marketplace listing's title alone. Iridium-plug sets run roughly 2,000 RUB (RU market, April 2025), with premium brands priced higher.

Real-world RIU purchase confirms it as a working replacement, and adds pricing data. Following on the RTIP-vs-RIU naming confusion above, multiple owners have since actually bought and installed TORCH QH5RIU-13 (a 4-pack, marketed as an analog of ILTR5A-13G, 25mm M14x1.25 thread) as a direct swap for worn factory NGK plugs — one owner reports the original NGKs lasted 80,000+ km before replacement, itself useful context on expected OEM plug life ^{789 1011}. Pricing (Oct 2025, RU market): 2,600 RUB or 2,124 RUB depending on seller ¹². Note a wrinkle in fitment terminology: one owner reports the plugs they removed were marked "QH6" (with platinum buildup on the electrode) rather than "QH5" — consistent with the naming confusion documented above, where "6" variants and generation suffixes (RTIP/RIU) create ambiguity across sources; treat exact suffix/generation matching as still unresolved and verify against your specific plug before ordering ¹³¹⁴.

Budget alternatives. Two further budget options reported by owners: LYNXauto SP216, bought for about 1,800 RUB during an Ozon sale (RU market, Oct 2025) ¹⁵; and VSP 2721 STARTVOLT, listed specifically for the FAW Besturn X80 (2016+) on Wildberries ¹⁶. Neither has the same depth of catalog cross-verification as the Torch QH5RTIP/QH5RIU-13 lines above, so treat them as reported-working alternatives rather than confirmed OEM-spec matches.

Independent confirmation from a second group: Denso ITV20TT also fits and performs well. Adding an alternative-brand data point to the OEM Torch spec and iridium alternatives documented above: Denso ITV20TT spark plugs are confirmed to fit and perform well on the X80 engine. One owner has run this Denso plug since the original installation with no reported issues, treat it as a second well-regarded iridium option alongside whatever alternatives are already documented in this card ^1718192021.

Media

Old NGK spark plug removed from the engine, before-photo for the QH5RIU-13 swap

New TORCH QH5RIU-13 iridium plug packaging

Side-by-side comparison of old NGK vs new TORCH QH5RIU-13 plugs

TORCH QH5RIU-13 plugs installed in the engine

Torch catalog page comparing iridium spark plug variants

Torch catalog page (2023-2024) showing the OEM plug spec

Close-up photo of the OEM spark plug electrode showing the iridium/platinum composite pad

Older Torch website screenshot listing a 1.1mm gap specification

Photo of a spark plug ordered from AliExpress, referenced for comparison

Related pages

• Torch spark plugs — codes, listings, gap rules
• Spark plugs — NGK, Denso and budget options
• Spark plug specifications and cross-references
• Spark plugs — Torch, Miles and Ford cross-refs
• Spark plugs — factory spec and gap disputes

Sources

This page is compiled from 21 community messages. Every fact carries a numbered reference to its original author and message.

Last updated: 2026-10-29