The Leno Law with Christian Robinson of SEMA - DWA! Ep. #941
Driving While Awesome
The Leno Law with Christian Robinson of SEMA - DWA! Ep. #941 Driving While Awesome · Jun 25, 2026
The Leno Law with Christian Robinson of SEMA - DWA! Ep. #941

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The Leno Law with Christian Robinson of SEMA - DWA! Ep. #941
Chevrolet Corvette
Car

Chevrolet Corvette

The Chevrolet Corvette is a sports car made by Chevrolet. It’s designed to be fast and fun to drive, especially when you accelerate and take corners. People talk about it a lot because it’s a well-known way to get high performance from a production car.

Toyota Camry
Car

Toyota Camry

The Toyota Camry is a common, everyday car that many people drive. In this segment it’s just being mentioned as a contrast to the performance cars being talked about.

1995 BMW M3
Car

1995 BMW M3

The BMW M3 is a high-performance BMW made by BMW’s performance team. This one is a 1995 model, and the big point is that it has to pass California emissions testing to be allowed on the road.

Term

California smog

“California smog” is California’s emissions test for cars. It’s meant to make sure your car isn’t polluting too much, and older cars can sometimes struggle unless everything is working correctly.

Term

bar 97 test

The “BAR 97” test is a specific California Air Resources Board (CARB) emissions test procedure used for many vehicles. It typically involves running the car on a dynamometer (roller) and measuring exhaust emissions under controlled conditions.

Term

roller

A “roller” is part of the emissions test where the car’s wheels are placed on rollers. The car stays put, but the wheels spin so they can measure exhaust emissions under controlled conditions.

Term

oxygen sensors

Oxygen sensors check the exhaust to see how much oxygen is left. The engine uses that info to adjust the fuel mixture, which matters a lot for passing emissions tests.

Term

new cats

“Cats” are catalytic converters that clean up exhaust. If they’re not working right, the car can produce too much pollution and fail an emissions test.

Term

injectors

Fuel injectors are the parts that spray fuel into the engine. If they don’t spray the right amount, the engine can burn fuel inefficiently and pollute more, which can hurt emissions test results.

1997 Toyota Supra twin turbo
Car

1997 Toyota Supra twin turbo

This is a 1997 Toyota Supra with a twin-turbo engine. “Twin turbo” means the engine gets extra air pressure from two turbochargers, which helps it make more power.

Term

blow off valve

A blow-off valve is a turbo car part that releases extra pressure when you lift off the gas. It helps the turbo stay happy and often makes that loud “pssh” sound.

Term

eight pillar gauges

This means adding a set of gauges mounted in the car’s pillar area. They let you watch important engine numbers while you drive, especially on turbo cars.

Company

SEMA

SEMA is an organization for companies that make and sell aftermarket car parts. They also work with government and host a big car-parts trade show in Las Vegas.

Topic

trade show in Las Vegas in November

This is talking about SEMA’s big annual industry event. It’s when aftermarket companies show off products and meet other people in the business.

Term

OBD2 port

OBD2 is a built-in computer system in many cars that can report problems. The OBD2 port is the plug you connect a scanner to so you can read error codes without taking the car apart.

Concept

comprehensive test

A comprehensive test is a more thorough check than a quick computer scan. Older cars may require extra steps and special equipment to test their emissions correctly.

Term

catalytic converters

A catalytic converter is an emissions device in the exhaust that helps clean up the gases coming out of the engine. Smog rules often depend on having the right emissions equipment installed.

Term

smog pump

A smog pump is an emissions device that helps clean up exhaust gases. If you change parts or swap an engine, you may need to keep the smog pump so the car still meets the rules.

Term

thermal reactors

Thermal reactors are older emissions devices that helped clean exhaust by using heat. They matter in this discussion because older cars (and their emissions parts) can be hard to replace or swap while still passing inspection.

Term

emissions sheet

An emissions sheet is the paperwork that lists test results for how clean a car is. In some cases, the numbers look good, but the car can still fail if the required emissions parts aren’t installed correctly.

Term

rolling cutoff

A rolling cutoff is a moving “line” in the rules that changes as time goes on. It’s used to decide when older vehicles qualify for different emissions treatment, instead of using one fixed year forever.

Term

historic vehicle cutoff

A historic vehicle cutoff is the rule that decides when a car counts as “old enough” to get special treatment. Changing that cutoff can affect whether the car has to follow the strictest emissions rules.

Concept

Leno's law

“Leno’s Law” is the name people use for a California bill (SB 1392). In the episode, they explain how it became a big focus for car enthusiasts and the industry.

Concept

SB 1392

SB 1392 is the official number of a California law proposal (a bill). The episode is talking about how that bill—called “Leno’s Law”—got support and momentum.

Person

Jay Leno

Jay Leno is a well-known car enthusiast and TV host who is described here as a key advocate for the legislation nicknamed “Leno’s Law.” The episode connects his involvement to SEMA’s efforts by explaining how he helped bring attention to the issue through relationships and advocacy.

Person

Mike Spagnola

Mike Spagnola is identified as the head of the organization referenced in the episode (SEMA). The host explains that Jay Leno’s input was routed to Spagnola, helping SEMA “get off to the races” on the legislative push.

Person

Senator Shannon Grove

Senator Shannon Grove is the legislator described as interacting with Jay Leno and supporting the legislative effort behind “Leno’s Law.” The segment emphasizes her role as an author and her alignment with the passion driving the bill’s progress.

Concept

governor's desk

“The governor’s desk” is a legislative process reference meaning the bill has reached the final stage where the governor can sign it into law or veto it. The hosts say they were disappointed it didn’t reach that point, but they believe they’re in a stronger position.

Term

bureau of automotive repair

The Bureau of Automotive Repair is a government office that regulates things like smog testing. They help make sure the testing program and equipment are set up correctly.

87 Carrera um 9 11
Car

87 Carrera um 9 11

This is a Porsche 911, a famous sports car. The speaker is using an older 911 as an example of how annoying smog/emissions rules can be for owners of classic-ish cars.

Term

DMV

DMV is the government office that deals with car paperwork like registration. The speaker is talking about paying fees through the DMV instead of dealing with emissions inspections.

Term

trouble codes

Trouble codes are like the car’s “check engine” error messages stored in its computer. They help inspectors see whether the car has an emissions-related problem.

Term

tailpipes

Tailpipes are where the exhaust comes out of the car. Some emissions tests measure the exhaust gases directly from the tailpipe, while others just scan the car’s computer.

Concept

25 year rolling

This is a rule where cars gradually become exempt from emissions testing as they get older—about 25 years. Instead of a fixed cutoff year, the eligibility keeps moving forward each year.

Term

rust

Rust is when metal parts corrode and weaken over time. The speaker is saying some areas don’t rust cars as badly, so more older cars are still around.

Topic

California tire law (passed in 2003) tying replacement tires to rolling resistance

They’re talking about a California rule (from 2003) that makes sure replacement tires don’t reduce fuel economy compared to the tires the car was originally set up with. It’s meant to keep efficiency testing assumptions valid.

Term

OEMs

OEMs are the companies that make the car in the first place. They also choose the tires that the car is designed around for efficiency testing.

Honda Civic
Car

Honda Civic

The Honda Civic is a common compact car. Different versions of it can come with different tires, which matters for things like fuel economy and grip.

Term

summer tire

A summer tire is made for warm weather roads. In cold weather it usually doesn’t grip as well as winter or all-season tires.

Term

rolling resistance coefficient

It’s a way to measure how “hard” it is for a tire to roll down the road. Tires with lower rolling resistance typically help you get better fuel economy.

Mclaren F1
Car

Mclaren F1

The McLaren F1 is a famous supercar from the 1990s. It’s known for being built for the driver, including a unique three-seat setup where the driver sits in the middle.

Mercedes Benz 600
Car

Mercedes Benz 600

The Mercedes-Benz 600 is an old-school luxury flagship. People often start with it when they want a big, high-status car—sometimes even turning it into a limo or custom build.

Term

super 600 compressor

In this context, “compressor” means a supercharger. It forces extra air into the engine so it can make more power than the original setup.

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