Smog Check from Smog Tech McHenry (47% Off)

Modesto

$29
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$54.75 47% $25.75
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In a Nutshell

Star-certified smog check station provides state required certificate

The Fine Print

Promotional value expires 90 days after purchase. Amount paid never expires. Limit 1 per person, may buy 1 additional as gift. Limit 1 per visit. Must use promotional value in 1 visit. Valid only for option purchased. All goods or services must be used by the same person. Appointment required; subject to availability. $8.25 fee applies for vehicles that pass smog check and need the certificate. Extra $10 fee per vehicles for 1995 models and older. Retest fee for vehicles 1996 models or newer $21.75; vehicles 1995 models or older $31.75. Merchant is solely responsible to purchasers for the care and quality of the advertised goods and services.

The Deal

  • $29 for Star Certified Vehicle Smog Check ($54.75 value)

Catalytic Converters: Keeping Combustion Clean

Cleaner cars make for cleaner air. Learn how catalytic converters help with Groupon’s guide.

A car’s engine is a dirty place, and it produces even dirtier exhaust. Vapors exit the combustion chamber carrying a nasty trio of smog promoters: nitrogen oxides, hydrocarbons, and carbon monoxide. As these pollutants barrel through the exhaust manifold (the set of tubes that feeds exhaust from each cylinder into the exhaust pipe), there’s only one thing standing between them and the innocent air outside: the three-way catalytic converter.

Situated just before the muffler, the converter is home to honeycombed ceramic cores coated with some combination of platinum, rhodium, and palladium—three rare metals that interact with the main components of the pollutants. When exhaust enters, the metals trigger chemical reactions that heat the gasses and rearrange their molecules. Under their influence, nitrogen oxides splinter into pure oxygen and nitrogen, while hydrocarbons and carbon monoxide are oxidized into less-harmful carbon dioxide and simple water. Since their introduction during the 1975 model year, these unseen cleaners have made air more breathable and much tastier: the EPA estimates that cars built today are 98% cleaner than their counterparts from the 1960s.

Customer Reviews

Great service with quick turn time and friendly staff. Real value and low price.
James S. · 2 days ago
Very clean business, quick and honest service. I would recommend for a smog check.
Jamie E. · 6 days ago
Fast, friendly service, both on the phone and in person. Thank you!
Chris W. · November 24, 2016
Merchant Location Map
  1. 1

    Modesto

    1313 McHenry Avenue

    Modesto, CA 95350

    +12094088660

    Get Directions

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