TRQ Iridium Spark Plugs 5 Piece Tune Up Kit - Reliable Fit for L5

In this review of the TRQ Iridium Spark Plugs 5 Piece Tune Up Kit the bottom line is simple: this kit is for owners of older L5 engines who want a straightforward, direct-fit replacement that improves longevity and can help fuel efficiency. The reviewer found the set especially useful for 1993-1998 Volvo and mid-1990s Acura and Audi models because it matches original fitment, uses an iridium tip for longer life, and arrives with resistor design to prevent ignition noise. It is a practical, budget-friendly tune-up option for do-it-yourself maintenance.

Key Features

• Direct fit replacement: Each spark plug is designed to replace original equipment without modification, saving time on installation and reducing the chance of fitment issues.
• Iridium tip: The iridium tip provides longer wear life compared to platinum, meaning fewer replacements over time.
• Resistor included: Built-in resistor reduces electromagnetic interference and protects electronics during ignition events.
• Heat range tested: Plugs have been tested for heat range to help restore like-new engine performance and reduce misfires.
• Comprehensive reference numbers: The kit lists many cross-reference numbers for compatibility checking, making it easier to confirm fit for several older models.
• Five-piece set: Sold as a five-plug kit, matching the L5 (five-cylinder) engine layout used by the compatible vehicles.

Who It's For

The TRQ 5 piece iridium kit is best for owners of 1993-1997 Volvo 850 and 1998 S70 with the 2.4L L5 engines, plus mid-1990s Acura TL and Vigor and early 90s Audi 90/Coupe Quattro L5 engines who prefer a direct-fit, do-it-yourself replacement. The kit appeals to drivers seeking improved longevity from iridium tips and who value straightforward compatibility checks.

It is less suitable for people who need OEM-branded parts for warranty reasons or for users of turbocharged variants not listed in the compatibility notes. Also, if real-time diagnostics show deeper ignition or fuel system issues, replacing spark plugs alone may not solve performance problems.

Pros & Cons

Pros

• Good quality iridium tips that tend to last longer than standard plugs.
• Pre-assembled, direct fit design makes installation quick and simple for DIY mechanics.
• Customers report improvements in fuel efficiency and an overall positive value for money.
• Includes resistor to minimize electromagnetic interference with vehicle electronics.

Cons

• Performance and acceleration feedback is mixed; some users reported poor running that may stem from other engine issues rather than the plugs themselves.
• Compatibility requires careful checking against the full fitment list to ensure exact vehicle match.

Specifications

Quantity	5 Piece
Spark Plug Type	Iridium
Hex Size	16 MM / 5/8 IN
Resistor	Included
Compatible Engines	L5 2.3L and L5 2.4L and L5 2.5L (listed models)
Fitment Examples	1995-98 Acura TL, 1992-94 Acura Vigor, 1989-97 Volvo/Audi L5 models

Our Verdict

The TRQ Iridium 5-piece kit is a sensible, cost-effective choice for owners of compatible mid-90s Volvos, Acuras, and Audis who want durable, direct-fit spark plugs and easy DIY installation. It delivers good value through longer-lasting iridium tips and straightforward compatibility, but buyers should confirm fitment carefully and address any underlying engine issues if performance does not improve.

Frequently Asked Questions

Will these plugs fit my 1996 Volvo 850?
Check the fitment list for the 1993-97 Volvo 850 L5 2.4L or 2.3L entries; this kit is intended for those L5 configurations.

Are these plugs suitable for turbo engines?
The description specifies naturally aspirated L5 engines; owners of turbocharged variants should verify engine specifics before purchasing.

Do they reduce radio interference?
Yes, the plugs include a resistor designed to reduce electromagnetic interference with vehicle electronics.