Most investors like to have at least part of their portfolio exposed to high-yielding shares.

Owning quality, reliable dividend-paying companies doesn’t mean you have to limit yourself to owning stocks in the S&P/ASX 20 (Index: ^AXTL) (ASX: XTL) however.

Stocks outside the Top 20 can also offer attractive fully franked yields and importantly they can have real growth potential too.

Here are two stocks to take a closer look at if you’re interested in supercharging your portfolio’s yield.

McMillan Shakespeare Limited (ASX: MMS) is one of Australia’s leading providers of novated leasing and salary packaging services.

The company reported pleasing levels of growth last financial year (FY) with the number of salary packages under management increasing to 293,000 and the number of novated vehicle leases growing to 55,800.

McMillan Shakespeare achieved a solid increase in underlying profits for the 12 months to 30 June 2016, with net profit surging 25.3% from $69.6 million to $87.2 million.

Underlying earnings per share (EPS) for FY2016 came in at 105.1 cps. According to analyst consensus data provided by Reuters, EPS are expected to rise over the next two years to reach 114.3 cps in FY 2018.

Pleasingly for income-seeking shareholders, the dividend was increased from 52 cents per share (cps) to 63 cps with the pay-out rate leaving plenty of headroom. This headroom should provide investors with comfort that the dividend is not just maintainable but also expandable.

While the regulatory scare which occurred in mid-2013 shouldn’t be forgotten – as it’s a reminder that operators in this space are subject to government policy changes –the group’s 5.1% fully franked yield certainly looks attractive.

Automotive Holdings Group Ltd (ASX: AHG), along with its peer and major shareholder AP Eagers Ltd (ASX: APE), is one of Australia’s largest automotive dealership groups.

Its business is diversified across both new and used cars, regions, and car brands. The group has expanded into the logistics industry, a move that many investors view as both non-core and a distraction for management.

In FY 2016 Automotive Holdings Group achieved a rise in sales and operating net profit after tax to $5.6 billion and $97.2 million respectively.

This was a particularly solid result considering the decline in earnings contribution from the refrigerated logistics division.

EPS came in at 31.7 cps, compared with 30.7 cps in the prior year.

Given Australia’s compound average growth rate in new vehicle sales has been 1.6% per annum over the past decade, there is good reason to be optimistic about Automotive Holdings Group’s ability to continue to grow its earnings.

Based on consensus forecasts, EPS are expected to hit 34.3 cps in FY 2018.

Dividends totalling 22.5 cps were paid in FY 2016. This pay-out should be comfortably maintained given it represents a pay-out ratio of just 71%. With the shares trading on a trailing fully franked yield of around 5%, this stock also looks attractive for income investors seeking dividend growth.

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Motley Fool contributor Tim McArthur has no position in any stocks mentioned. The Motley Fool Australia has no position in any of the stocks mentioned. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy. This article contains general investment advice only (under AFSL 400691). Authorised by Bruce Jackson.