1969–1976 Triumph TR 2.5L Spark Plugs
Catalog-listed plug, cross-brand equivalents, gap, and where to buy for the 1969–1976 Triumph TR 2.5L.
Listed in a manufacturer plug catalog — confirm against your owner's manual before buying.
The Denso IW20 is a 14mm thread, 19mm reach, gasket seat, heat range 20, iridium electrode spark plug. These specifications are decoded from the Denso part number and determine which plugs it safely cross-references to — a valid equivalent must match the thread, reach, seat and heat range.
Spark plugs that fit the 1969–1976 Triumph TR 2.5L
| Plug | Metal | Gap | Buy |
|---|---|---|---|
| Denso IW20 | Iridium | — | Buy |
| Denso IW20TT | Iridium | — | Buy |
| Denso W20EP-U | Copper | — | Buy |
| Denso W20TT | Copper | — | Buy |
| Denso VW20T | Copper | — | Buy |
Frequently asked questions
What spark plug does a 1969–1976 Triumph TR 2.5L use?
A manufacturer catalog lists the Denso IW20 (Iridium), gapped at the factory spec. Listed in a manufacturer plug catalog — confirm against your owner's manual before buying.
How many spark plugs does a 1969–1976 Triumph TR 2.5L need?
Check your owner's manual for the exact count for this engine.
What is the spark plug gap for a 1969–1976 Triumph TR 2.5L?
See the underhood emissions label — always confirm against the label or manual before installing.
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