Vehicles Smog Check for One or Two at Southport Smog (Up to 56% Off)

Give as a Gift
Unable to add now. Please try again later
Unable to remove now. Please try again later
Up to 56% Off

Customer Reviews

108 Ratings


Mike G. ·
Redeemed January 8, 2015
Don't buy the groupon it's cheaper if you just show up with $40 that includes a certificate.


April P. · 1 reviews
· Redeemed March 2, 2018
Professional and quick. Nice little waiting room. I will take my other vehicle there for SMOG test in July


Jack S. · 1 reviews
· Redeemed February 28, 2018
Well organised they get cars in and out quickly

What You'll Get

Choose Between Two Options

  • $44 for smog check for one vehicle ($89 value)
  • $79 for smog check for two vehicles ($178 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.

The Fine Print

Promotional value expires 90 days after purchase. Amount paid never expires. Limit 1 per person, may buy 3 additional as gifts. Valid only for option purchased. $8.25 additional cost for vehicles that pass smog check and need to certificate, Not valid with any other promotion or discount, Appointments are recommended and subject to availability, Not valid for RVs or box vans. Merchant is solely responsible to purchasers for the care and quality of the advertised goods and services.

About Southport Smog

By purchasing this deal you'll unlock points which can be spent on discounts and rewards. Every 5,000 points can be redeemed for $5 Off your next purchase.