Stop Trading!: Magna's a Mover

Any time there's a change in emissions standards, exhaust-systems maker Tenneco profits, a Credit Suisse analyst told Barron's this weekend. Cramer said he likes the thesis, but there are better stocks in the sector.

Tenneco is too expensive and it has a unattractive balance sheet, Cramer told Erin Burnett on Stop Trading! Tuesday. He prefers BorgWarner or Magna . MGA is the "cheapest" and the "best run," Cramer said, adding that it's a growth stock in the sector.

Investors looking for a nuclear-power play could buy NRG Energy , but only if it's for growth in France, China and Japan, Cramer said.

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